What is a reciprocal?
Well, a reciprocal is a <b>multiplicative inverse</b> of a number.
But what does that mean?
This means that when a number paired with its reciprocal and then multiplied together will give an answer of 1
How do we find the reciprocal?
Put simply, the reciprocal of a number is 1 divided by the number.
The reciprocal of 20 is 1 ÷ 20 = 0.05.
The reciprocal of 0.2 is 1÷ 0.2 = 5
The reciprocal of 2/3 is 1 ÷ 2/3 = 3/2
You can either work out 1 ÷ 20 or use the reciprocal button 1/x or x-1 on the calculator.