Factor pairs
1&4
2&2
5/10
1/2
1/3 x 2/4
2/12 or 1/6
5 and 10
5
Factor pairs for 12
1&12
2&6
3&4
6/18
1/3
5/8 x 1/2
5/16
50 and 200
50
Factor pairs for 15
1&15
3&5
10/40
1/4
1/10 x 5/10
5/100 or 1/20
18 and 12
6
Factor pairs for 50
1&50
2&25
5&10
100/1000
1/10
3/4 x 3/4
9/16
10, 20, and 30
10
Factor pairs for 24
1&24
2&12
3&8
4&6
50/70
5/7
4/6 x 5/6
20/36 or 5/9
15, 25, and 40
5