Answer:
11 / 20
Explanation:
3/4 - 1/5
You cannot perform this if you have two different denominator.
So multiply both pairs with each other's denominator.
3 × 5 = 15 1 × 4 = 4
4 × 5 = 20 5 × 4 = 20
Now we can perform subtraction.
15/20 - 4/20
15 - 4 = 11
11 / 20