Question

(20-19 3/4) +(17 3/4-17) +(2 1/2-17/24)

Answer 1

1) 80/4-79/4=1/4
2) 17 3/4-17=3/4
3) 5/2-17/24=60/24-17/24=43/24
4)1/4+3/4+43/24=(6+18+43)/24=67/24=2 19/24