Homework Booklet Chapter 7.4 question 10.

Lars ran 6 2/3 laps of the track at his school. Reneta ran 8 1/4 laps.

A) How much faster did Reneta run? Show your work.

First I turned 1/4 and 2/3 into a common denominator, which is 12.

1/4 X 3 = 3/12.

2/3 X 4 = 8/12

So after that I subtract 8/12 from 3/12 but you can't do that 'cause you'd get -8/12 or something. So you take a whole number, change 8 to 7 and now it's 15/12 - 8/12 which is 7/12.

Then 7-6 = 1.

1 + 7/12 = 1 7/12

B) Check your answer using estimation.

6 2/3 rounded off to7.

8 1/4 rounded off to 8

8 - 7 =1.

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