How much is -3 1/5 + 12 3/8?

Answer 1

You need to first get a common denominator.

12 3/8 = 12 15/40
3 1/5 = 3 8/40

12 15/40 - 3 8/40 = ?

Answer 2

so the answer is 9 7/40

Answer 3

Right.