The fraction obtained after interchanging the numerator and denominator of given fraction; is known as Reciprocal of a given Fraction.
In other words, a fraction obtained after inverting the given fraction is called Reciprocal of that given Fraction
Example = Find the reciprocal of 4/5
Answer = In the given Fraction 4/5
Numerator = 4
Denominator = 5
And we know to find the reciprocal we have to interchange the numerator and denominator, so we get
Numerator = 5
Denominator = 4
And Hence Reciprocal of given fraction = 5/4
Now let’s try to find reciprocal of below more fraction :
Reciprocal of 1/5 = 5/1
Reciprocal of 23/10 = 10/23
Reciprocal of 100/2 = 2/100
Reciprocal of 11/5 = 5/11

