4 per 5 dikali 1per2 ditambah 3per4

4/3*1/2+3/4
4/3*1/2=4/6
4/6+3/4=8/12+9/12=17/12=1 5/12
jadi jawaban na adalah 1 5/12

4/5 x 1/2 + 3/4 = 4/10 + 3/4 = 2/5 + 3/4 = 8/20 + 15/20 = 23/20 = 1. 3/20