Alan finished his homework in 1 1/2 hours. It took Jimmy 3/4 of an hour longer than Alan to finish his homework. How long did it take Jimmy to finish his homework?

Step-by-step explanation:

We need to add 3/4 of an hour to Alan's time.

Let's put Alan's time into a pure fraction.

Now we can add 3/4 to 3/2.

First, we need to find a common denominator (the bottom number).

4 and 2 is easy. The common denominator is 4. So let's solve it.

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.