Marley passes the library on her way to school. The distance from marlys house to library is 3/8 mile. The distance from Markus house to school is 4/5 mile.

Question

How far is it from the library to marlys school?

Answer 1

We need a common denominator. the LCD between the two is 40:

3/8 * 5/5 = 15/40

4/5 * 8/8 = 32/40

 

Now that we have a common denominator, we can subtract our fractions:

32/40 - 15/40 = 17/40 of a mile

Since the numerator and denominator don't share a common factor, that is as simplified as it's going to get.