hello!
In order to find the reciprocal of a number, we should flop it over.
Kindly consider the formula for additional details:-
![\sf{The~reciprocal~of~a~is~\displaystyle(1)/(a)}](https://img.qammunity.org/2022/formulas/mathematics/college/dh76jr63zfwbqftitn670u11hyfwqasuth.png)
According to the formula, the reciprocal of 20 is:-
![\sf{The~reciprocal~of~20~is~(1)/(20)}](https://img.qammunity.org/2022/formulas/mathematics/college/lj5sacuk1uxurhy2392vnln9zrn890aa79.png)
note:-
Hope everything is clear; if you need any explanation/clarification, kindly let me know, and I will comment and/or edit my answer :)