Tolong jawab soal soal tiga ini dengan benar! Pake caranya

12. 72/100 = 3/5 (C).
13. 2/5 + 12/10 -80/100 = 40+120-80/100 = 4/5(D)

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

no.12 72/100÷2/2=36/60÷2/2=18/30÷2/2=9/15÷3/3=3/5
no.14
1/2+3/4+2/5=10/20+15/20+8/20=23/20=1 13/20

semoga bisa membantu ^0^