Answer: 11/5, 1/20
Explanation:
The reciprocal of a value is the numerator and denominator of that value switched.
When you look at 5/11, we see that 5 is the numerator and 11 is the denominator. The reciprocal(switch numerator and denominator) is 11/5.
The reciprocal of 20 can be tricky because it isn't written with a denominator. But we know intuitively that 20 is also equal to 20/1.
Therefore we apply the same steps as in the first instance and we get that the reciprocal of 20/1 is 1/20.