On a saturday, saul can cut 4 lawns in 6 hours. if mitch can mow lawns at the same rate, how long will it take him to mow 9 lawns?

A way to solve this is to write a proportion and equation. 

Step one, the proportion: # of lawns/ hours             4/6 = x/9   
 x = number of lawns Mitch can mow.

Step two, the equation: 4/6 = x/9
-Cross multply
- you'll get, 6x and 36
- divide six from 6x and 36 to get the variable by itself (1x or x, and 6.)
- you'll now be left with, x = 6

Your answer is 6 lawns!

Mitch and mow 6 lawns in 9 hours!