9 per 20 +3 per 10 2. 6 per 20 + 3 per 5= tolong di jawab penting dikumpulin hari ini plisss

1. 9/20 + 3/10 = 9/20 + 6/20
n = 15/20
n = ¾

2. 6/20 + 3/5 = 6/20 + 12/20
n = 18/20
n = 9/10

9/20 + 3/10 =9/20+6/20=15/20=3/4
6/20+3/5= 6/20+12/20= 18/20=9/10