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Math Expert V
Joined: 02 Sep 2009
Posts: 61301
If a percent of b is c and c percent of d is e, what percent of a is e  [#permalink]

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Difficulty:   35% (medium)

Question Stats: 77% (02:29) correct 23% (01:32) wrong based on 22 sessions

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If a percent of b is c and c percent of d is e, what percent of a is e?

A. $$db$$

B. $$\frac{100a}{e}$$

C. $$\frac{bc}{100}$$

D. $$bc$$

E. $$\frac{db}{100}$$

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GMAT Club Legend  V
Joined: 18 Aug 2017
Posts: 5931
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
If a percent of b is c and c percent of d is e, what percent of a is e  [#permalink]

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given
a/100 * b= c
c/100*d=e
find
a*x/100 = e
x= e*100/a
solve
a = 100*c/b
so
x= dc/100 * 100*b/100c
x= bd/100 ;
IMO E

Bunuel wrote:
If a percent of b is c and c percent of d is e, what percent of a is e?

A. $$db$$

B. $$\frac{100a}{e}$$

C. $$\frac{bc}{100}$$

D. $$bc$$

E. $$\frac{db}{100}$$

Are You Up For the Challenge: 700 Level Questions If a percent of b is c and c percent of d is e, what percent of a is e   [#permalink] 26 Nov 2019, 00:14
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# If a percent of b is c and c percent of d is e, what percent of a is e  