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 405 by the denominator 450:
405 (numerator) ÷ 450 (denominator) = 0.9
As a result, you get 0.9 as your answer when you convert 405/450 to a decimal.