10 ?
---- = -----
0.32 1
You first multiply both sides by .032
10 = 0.32 ? / 1
This simplifies to
10 = 0.32 ?
divide both sides by 0.32
? = 10/0.32 = 31.25
Main trick is that you can do anything you want to an equation if you do the same operation on the other side of the equals sign.