помогите решить (7/8-1/4)+2/5

Question

помогите решить (7/8-1/4)+2/5

Answer 1

(7/8-1/4)+2/5=(7/8-2/8)+2/5=5/8+2/5=25/40+16/40=41/40=1 целая 1/40

Answer 2

(7:8-1:4)+2:5=(1.875-0.25)+0.4=1.625+0.4=2.025