Question

Clara is a the sales person. She sold a brief case for $66 and earned 20% commission How much commission did Clara earn?

Answer 1

Easy, you just have to multiply 66 * 0.20 = 13,2
the commission was 13,2

Answer 2

Claraisa earned $13.2 in commission...

20% of 66 dollars will be $13.2

You don't have to do this but you can put a zero after

It would look like this ($13.20)