CPM Homework Help : ACC6 Problem 5-40

The average annual rainfall in Tucson, Arizona is $12$ inches. Between January and April, $2.4$ inches of rain fell. What percentage of the annual rainfall fell after April (May through December)? You may want to draw a diagram to organize information.

Hint:

If $2.4$ inches of rain fell between January and April and the annual rainfall is about $12$ inches, the remainder must have fallen from May through December.

Hint 2:

Since $12-2.4=9.6$ , the rainfall from May through December must be $9.6$ inches.
If $9.6$ inches is taken as a fraction of the total average annual rainfall of $12$ inches,
what percentage of the annual rainfall after April does this fraction represent?

More Help:

$\frac{9.6}{12}\rightarrow\frac{96}{120}\rightarrow\frac{4}{5}$

Convert the fraction to a percentage to find the answer.