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 90 by the denominator 138:
90 (numerator) ÷ 138 (denominator) = 0.65
As a result, you get 0.65 as your answer when you convert 90/138 to a decimal.