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RadiumBall
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its E
as x% of y = xy/100
when this is increased by x%, xy/100 * [1+x/100]
which is equal to xy(100+x) / 10000
x% of y
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RadiumBall
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avdhutgmat
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we can do it by putting values too
consider x=10 and y=100 .
if x% of y i.e. 10 is increased by 10% means by 1.
hence look for value which gives value as 11
consider x=10 and y=100 .
if x% of y i.e. 10 is increased by 10% means by 1.
hence look for value which gives value as 11
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tpr-becky
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If you aren't perfect at algebra you can simply pick values most of the time when there are variables in the answer choices - I picked x=5 and y = 200
5% of 200 = 10.
increasing 10 by 5% gives you 10.5
Then plug your original x and y into the answers:
A) - way too big
B) 1000 + 5/100 - nope
c) Too big (100,000 +5)/100
D - nope
E) 1000(105)/10000 - reduces to 105/10 - which is 10.5 - correct answer.
5% of 200 = 10.
increasing 10 by 5% gives you 10.5
Then plug your original x and y into the answers:
A) - way too big
B) 1000 + 5/100 - nope
c) Too big (100,000 +5)/100
D - nope
E) 1000(105)/10000 - reduces to 105/10 - which is 10.5 - correct answer.
Becky
Master GMAT Instructor
The Princeton Review
Irvine, CA
Master GMAT Instructor
The Princeton Review
Irvine, CA
