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# profit and loss

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Intern
Joined: 30 Mar 2012
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profit and loss [#permalink]

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30 Mar 2012, 07:54
Hello

Can some one help with this sum please.

a teacher's salary was $4400 after an increase of 10%. what would her salary have been if he had receive an increase of 15%. how do you work this ... Manager Joined: 22 Feb 2012 Posts: 93 Schools: HBS '16 GMAT 1: 740 Q49 V42 GMAT 2: 670 Q42 V40 GPA: 3.47 WE: Corporate Finance (Aerospace and Defense) Followers: 2 Kudos [?]: 23 [0], given: 25 Re: profit and loss [#permalink] ### Show Tags 30 Mar 2012, 08:36 Quote: Hello Can some one help with this sum please. a teacher's salary was$4400 after an increase of 10%. what would her salary have been if he had receive an increase of 15%.

how do you work this ...

Salary prior to 10% increase = x

so 1.1x = 4400

solving for x,
x= 4000

Question is asking for 1.15x

1.15x = 4600
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Re: profit and loss [#permalink]

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30 Mar 2012, 09:09
wait how you got 1.1 not following
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Re: profit and loss [#permalink]

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30 Mar 2012, 09:13
I got 1.1=4000
but if x=1.15
1.15x=4000
x=4000/1.15
x=3478
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Re: profit and loss [#permalink]

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02 Apr 2012, 21:18
SmileyKing wrote:
Hello

Can some one help with this sum please.

a teacher's salary was $4400 after an increase of 10%. what would her salary have been if he had receive an increase of 15%. how do you work this ... Let me see if I can break this out into some steps: You know what the teacher's salary is after a 10% increase. What you need to solve for is the teacher's salary before the 10% increase. So the equation is set up like this: (1.10)(x) =$4400, where x=teacher's salary before the 10% increase

Solving for x, you get x = $4000 Now the question asks for what the teacher's salary is after a 15% increase. At this point you know the original salary (solved above), so the equation looks like: New Salary = (1.15)(4000) New Salary =$4600

You used the equation 1.15x = $4000, which is saying that a 15% increase to the salary of x is$4000. You have your terms mixed up.
Re: profit and loss   [#permalink] 02 Apr 2012, 21:18
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# profit and loss

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