# Question Video: Subtracting Unlike Fractions to Solve Word Problems Mathematics • 5th Grade

Sophia’s bottle contains 3/4 liters of water. If she drinks 1/8 liters from her bottle, how much water in liters is left over?

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### Video Transcript

Sophia’s bottle contains three-quarter liters of water. If she drinks one-eighth liters from her bottle, how much water in liters is left over?

We know that Sophia’s bottle contains three-quarter liters of water. If she drinks another eighth of a liter, how much water will she have left? We have to find three-quarters take away one-eighth. Before we can subtract, both of the denominators need to be the same. We know that eight is a multiple of four, so let’s see how many eighths are equal to three-quarters. Eight is the common denominator. How do we get from four to eight? We know that four times two is eight, so we need to multiply our numerator by two. And we know that three times two is six.

Now that we know that three-quarters is equal to six-eighths, we can subtract. If we’ve got six-eighths and we take away one of them, we’ll have five-eighths left. If Sophia’s bottle contains three-quarters of a liter of water and she drinks an eighth of a liter from her bottle, she will have five-eighths of a liter left over.