tolong ya ka besok mau dikumpul

13) 2/5 + 1,2 - 80%
= 2/5 + 12/10 - 80/100
= 2/5 + 6/5 - 4/5
= 4/5(D)

14)1/2 + 3/4 + 2/5
= 10/20 + 15/20 + 8/20
= 33/20 = 1 13/20(C)

15)4,25 - 1 1/4 x 2
= 425/100 - 5/4 x 2
= 85/20 - 10/4
= 17/4 - 5/2
= 17/4 - 10/4
= 7/4 = 1 3/4(A)

16)1 2/3 x 24% 
5/3 x 24/100 = 5/3 x 6/25
= 60/75 = 0,8

17)Uang Roni = Rp40000
Uang Edi = Rp40000 x 8/5
= Rp40000 ÷ 5 x 8
= Rp8000 x 8
= Rp64000
Jumlah = Rp64000 + Rp40000 = Rp104000(B)