Answer is 12/20 and 5/20
Step by step
Since we know our denominator is 20
We will set these up like this
3/5 = x/20
5 * 4 = 20 so we also multiply the numerator by 4 because we want to do the same on top and bottom. 3 * 4 = 12
Answer is 12/20
1/4 = x/20
4 * 5 = 20 so we also multiply the numerator by 5 because we want to do the same on top and bottom. 1 * 5 = 5
Answer is 5/20