Solution: 21/5 as a decimal is 4.2MethodsExplanation using the division method:One method to convert 21/5 to a decimal is by using the division method. Before we move ahead to the method, here is a quick recap on fractions: A fraction is a number representation that is broken down into two parts - the number on top is called the numerator, and the number on the bottom is called the denominator. To get a decimal using the division method, simply divide the numerator 21 by the denominator 5:21 (numerator) ÷ 5 (denominator) = 4.2And there you go! We got 4.2 as the answer when you convert 21/5 to a decimal.Practice more problems!All it takes to be better at something is some practice! Take a look at some more similar problems on converting fractions to decimals and give them a go:What is 26/132 as a decimal?What is 150/61 as a decimal?What is 81/14 as a decimal?What is 63/41 as a decimal?