How to Convert 0.81 to Fraction
As we know, to convert any number to a fraction, we put the number as the numerator and 1 in the denominator.
So we put the decimal number as a numerator and 1 as a denominator, then in order to make the numerator an integer, we need to multiply the numerator depending on how many numbers are on the right of the decimal point, and as we multiply the numerator we need also multiply the denominator to keep the fraction correct.
In our case, there is 2 number on the right of the decimal point, that means we need to multiply the numerator, and the denominator by 100
The fraction is already simplified