If b/(a + b) = 7/12, then what does a/b equal?

Question

A.5/12
B.5/7
C.7/5
D.7/19
E.19/12

ganand · Answer

Hi,

Given  \frac{b}{a+b} = \frac{7}{12}

or  \frac{a+b}{b} = \frac{12}{7}

=>  \frac{a}{b} + 1 = \frac{7}{12} 
=>  \frac{a}{b} = \frac{5}{7}  Answer: B.

Please modify the denominator of the question. It should be b/(a+b) = 7/12.

saswata4s · Answer

b/a + b and b/(a + b) is not the same. Please modify the question.

Cheers.

EMPOWERgmatRichC · Answer

Hi vikasp99, Bunuel et al.

Based on the correct answer, I agree that this question is not properly formatted. Could someone please edit the original prompt accordingly?

GMAT assassins aren't born, they're made,
Rich

Bunuel · Answer

Done. Thank you for noticing.

NandishSS · Answer

Hi,

A Quite easy question,b/(a + b) = 7/12

Here b=7 And a+b=12 then a=5 hence a/b=5/7

JeffTargetTestPrep · Answer

Let’s cross-multiply the given equation:

b/(a + b) = 7/12

12b = 7a + 7b

5b = 7a

5/7 = a/b

Answer: B

Abhishek009 · Answer

\frac{b}{(a + b)} = \frac{7}{12}

Let,  b = 7

Since,  a + b = 12

We have ,  a + 7 = 12

Thus,  a = 5

So,  \frac{a}{b} = \frac{5}{7} , Answer will be (B)

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