Question

If 40% of A is equal to 64% of B, then what will be A : B?

• A. 7 : 5
• B. 5 : 6
• C. 8 : 5
• D. 8 : 7

Answer 1

Answer:

C. 8 : 5

Given:
$40\% \text{ of } A = 64$
$\frac{40}{100}A = \frac{64}{100}B$

Cancel 100:
$40A = 64B$

$\frac{A}{B} = \frac{64}{40}$

Simplify:
$= \frac{8}{5}$

$=\boxed{8 : 5}$