Wednesday

April 16, 2014

April 16, 2014

Posted by **Tyler** on Wednesday, April 9, 2008 at 10:50pm.

There are 171 seventh graders eating lunch. This number represents 45% of all of the seventh grades. How many 7th graders are there in the school?

Would I take 171 x 45% and add them together or take 171 X .55 or??

- Math -
**Reiny**, Wednesday, April 9, 2008 at 10:58pmDo you know algebra?

let the number of students be x

.45x = 171

x = 171/.45

x = 380

or do it by the "3 step process"

45% represents 171

so 1% = 171/45 = 3.8

100% = 100*3.8 = 380

**Related Questions**

Math - Need help on this question: There are 32 sixth graders and 44 seventh ...

math - A soccer team consists of girls from sixth, seventh, and eighth grades. ...

math - A soccer team consists of girls from sixth, seventh, and eighth grades. ...

math - Ok, the problem says: a Middle school has 125 6th graders, 150 7th ...

math - mrs. karson's music class includes both 6th and seventh graders. the ...

English - For English class, we're doing a vocab. review for seventh graders, as...

math - The lunchroom workersare giving away free cookies today. They gave the ...

math - my P.E. teacher asked the 100 seventh graders in my school if they could ...

math - If there are 264 students in a school and there are 84 eighth graders and...

math - Of the 85 seventh graders, 27 are going on the class field trip. What ...