The first step to changing 3 78/21 into a decimal is to change it to an improper fraction. To do that, we need to multiply 3 by 21 and add its product to 78 in the numerator to get: 141/21. Now we will attempt to convert 141/21 to a decimal using the following method.
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 141 by the denominator 21:
141 (numerator) ÷ 21 (denominator) = 6.71
As a result, you get 6.71 as your answer when you convert 3 78/21 (or 141/21) to a decimal.
Practice some more problems on converting fractions to decimals:
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