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:-
According to the formula, the reciprocal of 1/20 is equal to:-
note:-
Hope everything is clear; if you need any explanation/clarification, kindly let me know, and I will comment and/or edit my answer :)