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Math Tutor Solution: 3 90/7 as a decimal is 15.86
Methods
First step from a math tutor – Making the fraction improper:
The first step to changing 3 90/7 into a decimal is to change it to an improper fraction. To do that, we need to multiply 3 by 7 and add its product to 90 in the numerator to get: 111/7. Now we will attempt to convert 111/7 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 111 by the denominator 7 (which you can enter in any calculator):
111 (numerator) ÷ 7 (denominator) = 15.86
And finally, you get 15.86 as your answer when you convert 3 90/7 (or 111/7) 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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