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Felix earned 30% more per month than Oscar. If Felix’s salary is decre

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Felix earned 30% more per month than Oscar. If Felix’s salary is decre [#permalink]

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New post 07 Feb 2016, 08:59
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Felix earned 30% more per month than Oscar. If Felix’s salary is decreased 10% and Oscar’s salary is increased by 10%, then Felix would be earning what percent more than Oscar?

A. 10%
B. 9.09%
C. 7%
D. 6.36%
E. It cannot be determined from the information given.
[Reveal] Spoiler: OA

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Re: Felix earned 30% more per month than Oscar. If Felix’s salary is decre [#permalink]

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New post 07 Feb 2016, 22:24
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Bunuel wrote:
Felix earned 30% more per month than Oscar. If Felix’s salary is decreased 10% and Oscar’s salary is increased by 10%, then Felix would be earning what percent more than Oscar?

A. 10%
B. 9.09%
C. 7%
D. 6.36%
E. It cannot be determined from the information given.


Hi,
This Q is all about taking the correct BASE for taking %s..

the very first step requires taking some numbers for each..
ONE should be 100...
it is easy to take 70 and 100 here..
but the BASE is 100 here, so the salary can be 100 and 130..

100 increases 10% =110..
130 decreases 10%=117..
so the increase is 7..
again the BASE is 110, so answer 7/110 * 100= 6.36% D

without calculations,
answer cannot be equal to or greater than 7, as 7 is on 110..
so D is the only one left
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Re: Felix earned 30% more per month than Oscar. If Felix’s salary is decre [#permalink]

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New post 31 Aug 2017, 23:28
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Re: Felix earned 30% more per month than Oscar. If Felix’s salary is decre   [#permalink] 31 Aug 2017, 23:28
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