tolong jawab dgn caranya

yang nomor berapa dek??

1) 6/16 = 6:16 = 0,375
2)4/9+11/15
20/45 + 33/45 = 53/45 = 1 8/45
3)25% - 0,15
25/100 = 1/4. 0,15×100 = 150%
150/100 = 3/2
1/4-2 = 1/2
semoga membantu!!!