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 98 by the denominator 20:
98 (numerator) ÷ 20 (denominator) = 4.9
As a result, you get 4.9 as your answer when you convert 1 78/20 (or 98/20) to a decimal.