12/20 and 3/5 are equivalent to 6/10
1 over 2 and 5 over 10
1/2 and 5/10
4/10 or 6/15
6 over 10
3/10 = 30/100
They are: 5/10 and 1/2
10/100 and 1000/10000
8/10
21 over 30 and 7 over 10
2 over 5, and 4 over 10
2 over 3 and 30 over 45
1 over 5 8 over 20