Question

Помогите решить 3/5-4/15 : 3/4-1/2=

Answer 1

3/5-4/15:3/4-1/2=
1) 4/15:3/4=16/45
2) 3/5-16/45=11/45
3) 11/45-1/2=22/90-45/90=  -13/90