Question

Edgar has a birdbath that holds 2 gallons of water. he only wants to fill it 3/4 full. how much water, in gallons, should edgar put in the birdbath?

Answer 1

1.5 gallons of water

3/4 x 2/1 = 3/2 which is equal to 1 1/2

Answer 2

Edgar should put 1.5(or 1$\frac{1}{2}$) in the birdbath.

$\frac{3}{4}$ ÷ $\frac{1}{2}$
OR 
$\frac{3}{4}$ × $\frac{2}{1}$ = 1.5 galloons.