Racquel walks 1 1/2 miles in 3/8 of an hour. What is Racquel's speed, in miles per hour?

1 1/2 can turn into 1.5 and 3/8 can turn into .375. After dividing 1.5 by .375 you get 4.
4

Here’s another way.
1 1/2 if multiplied by 4, can be 4/8. Now divide 1 4/8 divided by 3/8. That equals 4.
4

Racquel’s speed was 4 miles per hour