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# For each of her sales, a saleswoman receives a commission eq

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Senior Manager
Joined: 30 Aug 2006
Posts: 366
For each of her sales, a saleswoman receives a commission eq [#permalink]

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Updated on: 26 Nov 2013, 01:33
5
5
00:00

Difficulty:

(N/A)

Question Stats:

77% (01:00) correct 23% (01:08) wrong based on 365 sessions

For each of her sales, a saleswoman receives a commission equal to 20 percent of the first $500 of the total amount of the sale, plus 30 percent of the total amount in excess of$500. If the total amount of one of her sales was $800, the saleswoman’s commission was approximately what percent of the total amount of the sale? A. 22% B. 24% C. 25% D. 27% E. 28% Originally posted by londonluddite on 28 Oct 2006, 11:12. Last edited by Bunuel on 26 Nov 2013, 01:33, edited 1 time in total. Renamed the topic, edited the question and added the OA. Senior Manager Joined: 01 Oct 2006 Posts: 487 ### Show Tags 28 Oct 2006, 11:17 2 2 Total sales =800 Comission = (20/100)*500+ (30/100)*300 =100 + 90 =190 %Comission =(190/800)*100=23.7~ 24% Answer is B what is OA? Manager Joined: 04 Oct 2006 Posts: 116 Location: Florida, Argentina, UK Re: GMATPREP PS: Saleswomans commission [#permalink] ### Show Tags 28 Oct 2006, 11:29 My vote for 24% 190 = 800x x = 190/800 x = 23.75% Senior Manager Joined: 30 Aug 2006 Posts: 366 ### Show Tags 28 Oct 2006, 11:31 yep OA is B somehow i managed to figure 30/100 * 300 = 100 Intern Joined: 13 May 2013 Posts: 27 Concentration: International Business Re: For each of her sales, a saleswoman receives a commission eq [#permalink] ### Show Tags 06 Jul 2014, 05:54 What's a good tip to quickly see that 190/800 = 23,75? Math Expert Joined: 02 Sep 2009 Posts: 46162 Re: For each of her sales, a saleswoman receives a commission eq [#permalink] ### Show Tags 06 Jul 2014, 10:34 1 Saabs wrote: What's a good tip to quickly see that 190/800 = 23,75? You should do the math: $$\frac{190}{800}*100=\frac{190}{8}=\frac{95}{4}\approx{24}$$. _________________ Manager Joined: 11 Feb 2014 Posts: 67 Re: For each of her sales, a saleswoman receives a commission eq [#permalink] ### Show Tags 20 Jul 2014, 22:26 1 Can we move this question out of "Geometry" topic/tag? Math Expert Joined: 02 Sep 2009 Posts: 46162 Re: For each of her sales, a saleswoman receives a commission eq [#permalink] ### Show Tags 20 Jul 2014, 23:34 Game wrote: Can we move this question out of "Geometry" topic/tag? _____________________ Done. _________________ Manager Joined: 10 Mar 2013 Posts: 241 GMAT 1: 620 Q44 V31 GMAT 2: 690 Q47 V37 GMAT 3: 610 Q47 V28 GMAT 4: 700 Q50 V34 GMAT 5: 700 Q49 V36 GMAT 6: 690 Q48 V35 GMAT 7: 750 Q49 V42 GMAT 8: 730 Q50 V39 Re: For each of her sales, a saleswoman receives a commission eq [#permalink] ### Show Tags 30 Jul 2014, 04:49 Can someone add GMATPrep as a tag, because it is a GMATPrep question. I missed this question and chose C, because I approximated 1.9/8 to be 2/8=25%. Next time, I should look at the answer choices first and then see whether I need to do the math. SVP Status: The Best Or Nothing Joined: 27 Dec 2012 Posts: 1837 Location: India Concentration: General Management, Technology WE: Information Technology (Computer Software) Re: For each of her sales, a saleswoman receives a commission eq [#permalink] ### Show Tags 31 Jul 2014, 03:25 $$\frac{(\frac{20}{100})*500+ (\frac{30}{100})*300}{800} * 100$$ $$= \frac{190}{800} * 100$$ = 24% Answer = B _________________ Kindly press "+1 Kudos" to appreciate Director Joined: 10 Mar 2013 Posts: 562 Location: Germany Concentration: Finance, Entrepreneurship GMAT 1: 580 Q46 V24 GPA: 3.88 WE: Information Technology (Consulting) Re: For each of her sales, a saleswoman receives a commission eq [#permalink] ### Show Tags 02 Jan 2016, 16:01 Saabs wrote: What's a good tip to quickly see that 190/800 = 23,75? I think it would be more convenient to divide following to parts separately 90/4 = 90/4 + 5/4 =22,5 + 1,25=23,75 _________________ When you’re up, your friends know who you are. When you’re down, you know who your friends are. Share some Kudos, if my posts help you. Thank you ! 800Score ONLY QUANT CAT1 51, CAT2 50, CAT3 50 GMAT PREP 670 MGMAT CAT 630 KAPLAN CAT 660 Intern Joined: 20 Jan 2017 Posts: 6 Re: For each of her sales, a saleswoman receives a commission eq [#permalink] ### Show Tags 03 Jun 2018, 12:18 I have a question Given that everyone has solved this, if I do (19/80)*100 = 23.75% ~ 24% Hence, choice B is the answer if I round off 19 to 20 in order to get (20/80)*100=25% Choice C is wrong. So my question is, what is the way to ensure I am not falling into this rounding off calculation error? Would you suggest not doing the rounding off. However, in other gmat questions rounding off is very helpful. SC Moderator Joined: 22 May 2016 Posts: 1751 For each of her sales, a saleswoman receives a commission eq [#permalink] ### Show Tags 04 Jun 2018, 13:32 1 londonluddite wrote: For each of her sales, a saleswoman receives a commission equal to 20 percent of the first$500 of the total amount of the sale, plus 30 percent of the total amount in excess of $500. If the total amount of one of her sales was$800, the saleswoman’s commission was approximately what percent of the total amount of the sale?

A. 22%
B. 24%
C. 25%
D. 27%
E. 28%

khan0210 wrote:
I have a question

Given that everyone has solved this,

if I do (19/80)*100 = 23.75% ~ 24%
Hence, choice B is the answer

if I round off 19 to 20 in order to get (20/80)*100=25%
Choice C is wrong.

So my question is, what is the way to ensure I am not falling into this rounding off calculation error?
Would you suggest not doing the rounding off. However, in other gmat questions rounding off is very helpful.

khan0210 , if answers are too close together, as here, do not estimate.

Determining what constitutes "too close together" is not an exact science.

But one and two percent between answers?

$$\frac{1}{100}$$ and $$\frac{2}{100}$$?

And hundreds of dollars at issue?

Don't round.

I agree that to estimate or round is often a shrewd strategy.

Experience with a lot of questions is the best teacher. I can say safely, however, that when the difference between and among answers is 1-2%, you should not estimate. See Bunuel
above.

mikemcgarry wrote an excellent overview on the matter, titled The Power of Estimation on GMAT Quant, here.
Hope that helps.
_________________

In the depths of winter, I finally learned
that within me there lay an invincible summer.

For each of her sales, a saleswoman receives a commission eq   [#permalink] 04 Jun 2018, 13:32
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