Question Video: Subtracting Unlike Fractions to Solve Word Problems

Jackson has 1/2 of a chocolate bar and he eats 1/6 of it. How much of the chocolate bar is left over?

01:52

Video Transcript

Jackson has half of a chocolate bar and he eats one-sixth of it. How much of the chocolate bar is left over?

If Jackson has a half of a chocolate bar and he eats a sixth of it, to find out how much of the chocolate bar is left over, we need to subtract one-sixth from a half. Before we can subtract, both of the denominators need to be the same. Six is a multiple of two, so we could make both of the denominators a six. How many sixths are equal to one-half? How do we get from two to six? Two times three is six. We multiplied the denominator by three. Now we need to multiply the numerator by three, and we know that one times three is three. Now that we know a half is equal to three-sixths, we can subtract. Three-sixths subtract one-sixth equals two-sixths.

If we have three-sixths and we take one away, we’ll have two-sixths left. But we need to give our answer in its simplest form. Two-sixths is equal to one-third. If we divide two by two, we get one. And if we divide six by two, we get three. A half subtract one-sixth equals two-sixths or one-third.

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.