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Assuming the math club had 15 sixth graders, 12 seventh graders, 13 eighth graders and no other members, then:

There are 15 + 12 = 27 students that are sixth or seventh graders.

There are 15 + 12 + 13 = 40 members.

So the fraction that are sixth or seventh graders is 27/40.

Using long division, 27/40 = 0.675 = 67.5%

So 67.5% of the math club members are sixth or seventh graders.

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โˆ™ 2008-04-18 03:57:57
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Q: School has 15 sixth graders 12 sevenths and 13 eight graders what percentage of math club members are either sixth or seventh graders?
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