David M. answered 10/22/14
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Dave "The Math Whiz"
The 8th grade sold (200/300) * 100% = 66.7% of the tickets they had.
The 7th grade sold (225/250) * 100% = 90.0% of the tickets they had.
The 8th grade sold (250/250+225) * 100% = 52.63% of all the tickets sold.
The 7th grade sold (225/250+225) * 100% = 47.37% of all the tickets sold.
The 8th grade sold (250/300+200) * 100% = 50.0% of all the tickets.
The 7th grade sold (225/300+200) * 100% = 45.0% of all the tickets.
Not sure what answer is looked for.