Question

A pipe is leaking out 1.5 cups per day about how many gallons per week is a pipe leaking

Answer 1

There are 16 cups in a gallon.
If the pipe is leaking 1.5 cups every day, that is only 10.5 cups.
10.5 cups of water do not get you to a gallon.
But, if you want to see how many gallons there would be in two weeks, that would be 21 cups which is equivalent to 1 gallon and 4 cups.
Hope this helps!

Answer 2

The pipe is leaking 0.65625 gallons a week

There's 16 cups in a gallon.
1.5*7 = 10.5 cups
10.5/16 = 0.65625