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 102 by the denominator 42:
102 (numerator) ÷ 42 (denominator) = 2.43
As a result, you get 2.43 as your answer when you convert 2 18/42 (or 102/42) to a decimal.