Hello!
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In order to find the reciprocal of a number, we should flop it over; if you have the slightest doubt regarding the above sentence, you can consult the following formula:-
![\sf{T}\bf{h}\sf{e}~\bf{r}\sf{e}\bf{c}\sf{i}\bf{p}\sf{r}{\bf{o}\sf{c}\bf{a}{\sf{l}~\mathrm{of~a~equals~\displaystyle\frac{1}{{a}}}}](https://img.qammunity.org/2022/formulas/mathematics/high-school/3wqjdy3hwjs209bc9a67bm3b38ghtuz955.png)
According to the formula, the reciprocal of 1/20 is equal to:-
![\sf{\displaystyle(20)/(1)} ~or~20}](https://img.qammunity.org/2022/formulas/mathematics/high-school/qy4xddaezt4aobty5x84lp3lv8s2ursnut.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 :)