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 128 by the denominator 3:
128 (numerator) ÷ 3 (denominator) = 42.67
As a result, you get 42.67 as your answer when you convert 30 38/3 (or 128/3) to a decimal.