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 42 by the denominator 20:
42 (numerator) ÷ 20 (denominator) = 2.1
As a result, you get 2.1 as your answer when you convert 2 2/20 (or 42/20) to a decimal.