Write = or + inside the _ to make the statement correct

12/6 _ 6/5
90/50 _ 9/5
1/15 _ 2/11
25/10 _ 7/5
10/12 _ 100/120
24/36 _ 12/48
28/8 _ 35/10
9/15 _ 24/40
39/15 _ 273/105
​