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GMAT Equations and Inequalities Ch. 13 #7

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galinagranskay
 Post subject: GMAT Equations and Inequalities Ch. 13 #7
 Post Posted: Mon Nov 14, 2011 3:50 pm 
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Forum Guests


Posts: 4
Chapter 13
#7 . How would I solve it using algebra?
X % of Y % of Z , is decreased by Y %. What is the result...

This is how far, I get
xyz/10,000 - 100y/10,000 and then, I get stuck.
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nbf1186
 Post subject: Re: GMAT Equations and Inequalities Ch. 13 #7
 Post Posted: Fri Nov 18, 2011 2:45 pm 
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Students


Posts: 5
y% of z is yz/100
x% of that is xyz/10000

Decreasing that by y% yields (100-y)/100*xyz/10000

Then just simplify.
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jnelson0612
 Post subject: Re: GMAT Equations and Inequalities Ch. 13 #7
 Post Posted: Sat Dec 10, 2011 9:39 pm 
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ManhattanGMAT Staff


Posts: 1857
nbf1186 wrote:
y% of z is yz/100
x% of that is xyz/10000

Decreasing that by y% yields (100-y)/100*xyz/10000

Then just simplify.


Great! Thank you!

Galina, let us know if you need more assistance.

_________________
Jamie Nelson
ManhattanGMAT Instructor
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