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Question Stats: 70% (02:17) correct 30% (02:28) wrong based on 983 sessions

### HideShow timer Statistics The price of gasoline at a service station increased from $1.65 per gallon last week to$1.82 per gallon this week. Sally paid $26.40 for gasoline last week at the station. How much more will Sally pay this week at the station for the same amount of gasoline? A.$1.70

B. $2.55 C.$2.64

D. $2.72 E.$2.90

NEW question from GMAT® Official Guide 2019

(PS13159)

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Intern  B
Joined: 07 Oct 2018
Posts: 6

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2
2

Gasoline = 26.40/1.65 = 16 galloons
Price difference = (1.82-1.65) = $0.17 per gallon Price difference for 16 gallons = (0.17*16) = 2.72 Sent from my ONEPLUS A3003 using GMAT Club Forum mobile app Senior PS Moderator V Joined: 26 Feb 2016 Posts: 3359 Location: India GPA: 3.12 The price of gasoline at a service station increased from$1.65 per ga  [#permalink]

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2
Bunuel wrote:
The price of gasoline at a service station increased from $1.65 per gallon last week to$1.82 per gallon this week. Sally paid $26.40 for gasoline last week at the station. How much more will Sally pay this week at the station for the same amount of gasoline? A.$1.70

B. $2.55 C.$2.64

D. $2.72 E.$2.90

NEW question from GMAT® Official Guide 2019

(PS13159)

Since the price of gasoline goes up from $1.65 to$1.82 from last week to now,
the amount that Sally spends on gasoline also goes up by a similar margin.

As, 1.65 -> 26.40 | 1.82 -> x(amount Sally spent on gasoline)

$$1.65 * x = 26.40 * 1.82$$ ->$$x = 26.40 * \frac{1.82}{1.65} = 29.12$$

Therefore, Sally spends $$29.12 - 26.40 = 2.72$$(Option D) more on gasoline this week.
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e-GMAT Representative V
Joined: 04 Jan 2015
Posts: 2943
Re: The price of gasoline at a service station increased from $1.65 per ga [#permalink] ### Show Tags 1 2 Solution Given: • The price of gasoline at a service station increased from$1.65 per gallon to $1.82 per gallon • Sally paid$26.40 for last gasoline last week

To find:
• What will be the equivalent price Sally have to pay this week, due to price increase

Approach and Working:
• Increase in price per gallon = $$(1.82 - 1.65) = 0.17$$

Therefore, we can say:
• In $1.65 the cost increases$0.17
Or, in $26.40 the cost increases $$\frac{0.17}{1.65} * 26.40 = 2.72$$ Hence, the correct answer is option D. Answer: D _________________ Target Test Prep Representative G Status: Head GMAT Instructor Affiliations: Target Test Prep Joined: 04 Mar 2011 Posts: 2822 Re: The price of gasoline at a service station increased from$1.65 per ga  [#permalink]

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Bunuel wrote:
The price of gasoline at a service station increased from $1.65 per gallon last week to$1.82 per gallon this week. Sally paid $26.40 for gasoline last week at the station. How much more will Sally pay this week at the station for the same amount of gasoline? A.$1.70

B. $2.55 C.$2.64

D. $2.72 E.$2.90

Since $26.40 bought 26.40/1.65 = 16 gallons last week, and this week she has to pay 1.82 - 1.65 =$0.17 more per gallon, she has to pay 16 x 0.17 = $2.72 more this week for the same amount of gasoline. Answer: D _________________ # Jeffrey Miller Head of GMAT Instruction Jeff@TargetTestPrep.com See why Target Test Prep is the top rated GMAT quant course on GMAT Club. Read Our Reviews If you find one of my posts helpful, please take a moment to click on the "Kudos" button. Intern  B Joined: 26 Jul 2018 Posts: 13 Re: The price of gasoline at a service station increased from$1.65 per ga  [#permalink]

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1
JeffTargetTestPrep wrote:
Bunuel wrote:
The price of gasoline at a service station increased from $1.65 per gallon last week to$1.82 per gallon this week. Sally paid $26.40 for gasoline last week at the station. How much more will Sally pay this week at the station for the same amount of gasoline? A.$1.70

B. $2.55 C.$2.64

D. $2.72 E.$2.90

Since $26.40 bought 26.40/1.65 = 16 gallons last week, and this week she has to pay 1.82 - 1.65 =$0.17 more per gallon, she has to pay 16 x 0.17 = $2.72 more this week for the same amount of gasoline. Answer: D How to easily calculate this 26.40/1.65 = 16? Manager  S Joined: 11 Aug 2018 Posts: 111 Location: Pakistan GPA: 2.73 Re: The price of gasoline at a service station increased from$1.65 per ga  [#permalink]

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1
EgmatQuantExpert wrote:

Solution

Given:
• The price of gasoline at a service station increased from $1.65 per gallon to$1.82 per gallon
• Sally paid $26.40 for last gasoline last week To find: • What will be the equivalent price Sally have to pay this week, due to price increase Approach and Working: • Increase in price per gallon = $$(1.82 - 1.65) = 0.17$$ Therefore, we can say: • In$1.65 the cost increases $0.17 Or, in$26.40 the cost increases $$\frac{0.17}{1.65} * 26.40 = 2.72$$

Hence, the correct answer is option D.

Gasoline = 26.40/1.65 = 16 galloons
16*1.82 = 29.12
29.12-26.40=2.72

Hello egmat Pyal the problem here is the process i mentioned to solve this question is more natural to me but the problem is it takes lot of calculation i am unable to map out the clean and easy way in any GMAT question as you have done. if you could help me find how to do fewer calculations like your method. i would be really obliged.
Thanks
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VP  G
Joined: 09 Mar 2018
Posts: 1002
Location: India
Re: The price of gasoline at a service station increased from $1.65 per ga [#permalink] ### Show Tags Bunuel wrote: The price of gasoline at a service station increased from$1.65 per gallon last week to $1.82 per gallon this week. Sally paid$26.40 for gasoline last week at the station. How much more will Sally pay this week at the station for the same amount of gasoline?

NEW question from GMAT® Official Guide 2019

(PS13159)

He filled, this much liters last week = 26.40 / 1.65 = 16

This week he will fill = 16 * 1.82 = 29.12

Difference = 29.12 - 26.40

D. $2.72 _________________ If you notice any discrepancy in my reasoning, please let me know. Lets improve together. Quote which i can relate to. Many of life's failures happen with people who do not realize how close they were to success when they gave up. Board of Directors P Status: QA & VA Forum Moderator Joined: 11 Jun 2011 Posts: 4512 Location: India GPA: 3.5 WE: Business Development (Commercial Banking) Re: The price of gasoline at a service station increased from$1.65 per ga  [#permalink]

### Show Tags

Bunuel wrote:
The price of gasoline at a service station increased from $1.65 per gallon last week to$1.82 per gallon this week. Sally paid $26.40 for gasoline last week at the station. How much more will Sally pay this week at the station for the same amount of gasoline? A.$1.70

B. $2.55 C.$2.64

D. $2.72 E.$2.90

NEW question from GMAT® Official Guide 2019

(PS13159)

$$\frac{2640}{165}*182$$

$$= 2912$$

This, Difference is $$2912 - 2640 = 272$$, Answer must be (D)
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CEO  V
Joined: 12 Sep 2015
Posts: 3853
Re: The price of gasoline at a service station increased from $1.65 per ga [#permalink] ### Show Tags Top Contributor Bunuel wrote: The price of gasoline at a service station increased from$1.65 per gallon last week to $1.82 per gallon this week. Sally paid$26.40 for gasoline last week at the station. How much more will Sally pay this week at the station for the same amount of gasoline?

A. $1.70 B.$2.55
C. $2.64 D.$2.72
E. $2.90 NEW question from GMAT® Official Guide 2019 (PS13159) Since the amount paid is proportional to the price per gallon, we can use equivalent ratios Let x = how much Sally will pay THIS WEEK We get: 26.40/1.65 = x/1.82 Cross multiply to get: 1.65x = (26.40)(1.82) Divide both sides by 1.65 to get: x = (26.40)(1.82)/1.65 So, the amount Sally pays this week = (26.40)(1.82)/1.65 ASIDE: This expression is a bit of a mess to calculate (without a calculator!!) Notice that 1.82/1.65 probably won't simplify nicely, but maybe 26.40/1.65 will simplify. At this point, we have two options. We can use long division to calculate 26.40/1.65, or we can try to simplify the fraction. Let's simplify the fraction Take: 26.40/1.65 Multiply top and bottom by 100 to get: 2640/165 [much easier to work with integers!] Divide top and bottom by 5 to get: 528/33 [below I have a video that shows a quick way to mentally divide numbers by 5] Divide top and bottom by 3 to get: 176/11 Divide top and bottom by 11 to get: 16 Since 26.40/1.65 = 16, we know that (26.40)(1.82)/1.65 = (1.82)(26.40/1.65) = (1.82)(16) =$29.12

How much more will Sally pay this week at the station for the same amount of gasoline?
Answer = $29.12 -$26.40
= $2.72 Answer: D It's not pretty, but it MIGHT be a little faster than long division. VIDEO ON MENTALLY DIVIDING BY 5 _________________ Manager  B Joined: 25 Sep 2018 Posts: 60 Re: The price of gasoline at a service station increased from$1.65 per ga  [#permalink]

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Let,
Number of gallon = x
So,
1.65x=26.40

=> x = 26.40/1.65=16 gallons

More price per gallon = (1.82-1.65)=0.17

Thus,

More price should be given for total gallons = 16*0.17= 2.72

Posted from my mobile device
Manager  B
Joined: 25 Sep 2018
Posts: 60
Re: The price of gasoline at a service station increased from $1.65 per ga [#permalink] ### Show Tags Bunuel wrote: The price of gasoline at a service station increased from$1.65 per gallon last week to $1.82 per gallon this week. Sally paid$26.40 for gasoline last week at the station. How much more will Sally pay this week at the station for the same amount of gasoline?

A. $1.70 B.$2.55

C. $2.64 D.$2.72

E. $2.90 NEW question from GMAT® Official Guide 2019 (PS13159) Let, Number of gallon = x So, 1.65x=26.40 => x = 26.40/1.65=16 gallons More price per gallon = (1.82-1.65)=0.17 Thus, More price should be given for total gallons = 16*0.17= 2.72 Answer is D Posted from my mobile device Intern  B Joined: 06 Mar 2019 Posts: 45 Schools: IMD '21 Re: The price of gasoline at a service station increased from$1.65 per ga  [#permalink]

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Is there really no better way to divide 26.40 / 1.65 than just using brute force?
Intern  B
Status: Studying for GMAT
Joined: 06 Jan 2015
Posts: 19
Location: United Kingdom

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Hi!

I prefer mental math in such questions. We know there is a 17 point increase on 165. it'd be a 10% rise had it been on 170. a drop of 5 in the denominator would skew result by just over 0.3 points. so for final payment we know its definitely more than 2.64 ie more than 10%. 2.90 is almost 11% i figured hence it should be 2.72 Re: The price of gasoline at a service station increased from $1.65 per ga [#permalink] 25 May 2019, 01:17 Display posts from previous: Sort by # The price of gasoline at a service station increased from$1.65 per ga   