Question

30%of what number is 9 find the whole

Answer 1

We can set up a proportion to find the answer.

$\frac{9}{x} = \frac{30}{100}$

Cross multiply

$9(100) = 30x$

Solve for x

$x = \frac{900}{30}$

x = 30

So 9 is 30% of 30.

The answer is 30.

Answer 2

Line up % with % and number with number

30% is 9
100% is ?

Those numbers are in proportion so we can cross multiply to find the missing part of the proportion.

?=100•9/30=30

So 30% of 30 is 9