Question

The rainfall total this year was 10.2 inches which is 20% less than last year's total rainfall. What was last years total rainfall?

Answer 1

Answer:

The total rainfall last year is 12.75 inches.

Step-by-step explanation:

The total rainfall this year is 10.2 inches.

Let the total rainfall last year be x inches.

It is given that the total rain this year 20% less than last year's total rainfall.

$x-\frac{20}{100}x=10.2$

$\frac{100x-20x}{100}=10.2$

$\frac{80x}{100}=10.2$

$\frac{8x}{10}=10.2$

$8x=102$

$x=12.75$

Therefore total rainfall last year is 12.75 inches.