(1-7/8)+1,6*3/4-17/40

Question

(1-7/8)+1,6*3/4-17/40

Answer 1

1)1-7\8=8\8-7\8=1\8
2)1,6*3\4=1,6*0,75=1,2
3)1\8+1,2=0,125+1,2=1,325
4)1,325-17\40=1,325-0,425=0,9

Answer 2

8/8-7/8=1/8
16/10*3/4=48/40
1/8+48/40=53/40
53/40-17/40=36/40=9/10