A fraction is written in terms of two parts: the number on top is called the numerator and the number on the bottom is called the denominator. We can use the division method to solve this question. To get a decimal, simply divide the numerator 100 by the denominator 810:
100 (numerator) ÷ 810 (denominator) = 0.12
As a result, you get 0.12 as your answer when you convert 100/810 to a decimal.