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Math Tutor Solution: 12 21/2 as a decimal is 22.5
Methods
First step from a math tutor – Making the fraction improper:
The first step to changing 12 21/2 into a decimal is to change it to an improper fraction. To do that, we need to multiply 12 by 2 and add its product to 21 in the numerator to get: 45/2. Now we will attempt to convert 45/2 to a decimal using the following method:
Math tutor's explanation for using the division method:
One method to convert 45/2 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 45 by the denominator 2:
45 (numerator) ÷ 2 (denominator) = 22.5
And there you go! We got 22.5 as the answer when you convert 12 21/2 (or 45/2) to a decimal.
Math Tutor Suggests: Practice more 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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