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Find the difference after you find a common denominator. Write the answer in simplest form.

1. 3/7 - 1/3

2. 4/5 - 2/3

3. 7/9 - 1/4

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1) 3/7 - 1/3 =
9/21 - 7/21 =
2) 4/5 - 2/3 =
12/15 - 10/15 =
3) 7/9 - 1/4 =
28/36 - 9/36 =

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Use the following information to answer these real word problems. Must show work by writing the number sentence and then solving.

1. The football team ran for an average of 78 3/4 yards the first half of the game. In the second half of the game, they ran for an average of 85 3/8 yards. What was the difference in average yardage for the game?

2. The cost of a share of stock for a fast food restaurant chain rose from \$24 3/4 per share to \$28 1/3 per share. What was the amount of increase in the cost per share?
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1. Let d = difference in yardage
d .= 85 3/8 - 78 3/4
= 85 3/8 - 78 6/8
=. 84 11/8 - 78 6/8
= 6 5/8 yds
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2. Let a = amount of increase
a = 28 1/3 - 24 3/4
= 28 4/12 - 24 9/12
= 27 16/12 - 24 9/12
= 3 7/12
= \$3 7/12
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Hi. It's 3 days later than that last post. There was supposed to be a comment from you one of my answers from yesterday. But it wasn't there.