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Math Tutor Solution: 12 21/5 as a decimal is 16.2
Methods
First step from a math tutor – Making the fraction improper:
The first step to changing 12 21/5 into a decimal is to change it to an improper fraction. To do that, we need to multiply 12 by 5 and add its product to 21 in the numerator to get: 81/5. Now we will attempt to convert 81/5 to a decimal using the following method:
Math Tutor Explanation for using the division method:
A fraction is usually split into two parts: the first part is the number on top, called the numerator; and the second part is the number on the bottom, called the denominator. These are both separated by a line called the “divisor line”. We can use the division method help to solve this question: to get a decimal, simply divide the numerator 81 by the denominator 5 (which you can enter in any calculator):
81 (numerator) ÷ 5 (denominator) = 16.2
And finally, you get 16.2 as your answer when you convert 12 21/5 (or 81/5) to a decimal.
Math Tutor Suggests: Practice more conversion problems
All it takes to be better at something is some practice! Our math tutors suggest that you take a look at some more similar problems on converting fractions to decimals and give them a go:
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