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 637 by the denominator 1000:
637 (numerator) ÷ 1000 (denominator) = 0.64
As a result, you get 0.64 as your answer when you convert 637/1000 to a decimal.