A certain bushel of wheat generates one-third… | GMAT Sprint

Free Practice Question

PS · Problem Solving

705-805

Fractions/Ratios/Decimals

A certain bushel of wheat generates one-third the profit of a bushel of corn. If a bushel of corn generates five-fourths the profit of a bushel of truffles, what fraction of the profit from a bushel of wheat is the profit from a bushel of truffles?

Correct answer marked below

5/12

Correct

4/5

5/4

5/3

12/5

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Explanation

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Official Explanation

Official

Let’s say:

Profit from wheat =

W

Profit from corn =

C

Profit from truffles =

T

\frac{W}{C} = \frac{1}{3}

and

\frac{C}{T} = \frac{5}{4}

…

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What this question tests

Your ability to convert between fractions, ratios, and decimals and to reason proportionally.

Cross-multiplying incorrectly or mixing up the ratio parts — a part:part ratio is not a fraction of the whole.