17 / (3 / 5 + 1 / 4) + (7 / 8 − 1 / 4) × (4 / 5)2

Question

17 / (3 / 5 + 1 / 4) + (7 / 8 − 1 / 4) × (4 / 5)2

Answer 1

17/(0,6+0,25)+(0,875-0,25)*(0,8)2=17/0,85+0,625*0,8*2=20+1=21