Question

ПОМОГИТЕ!!!!!
4/5 + 7/15 =
6 2/3 + 2 1/2 =
8 3/4 - 5 1/6 =
4 1/3 - 7/10 =

Answer 1

4/5+7/15=1 4/15
6 2/3+2 1/2=9 1/6
8 3/4-5 1/6=3 7/12
4 1/3-7/10=3 19/30