# Math

posted by .

How do I solve this?

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 -

Do 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

• Math -

How do I solve this word problem
to do with fractions ro

What is one seventh of 6.3?

## Similar Questions

2. ### math

my P.E. teacher asked the 100 seventh graders in my school if they could swim. Half of the boys and two thirds of the girls said yes. Seventeen boys said no. How many seventh graders know how to swim?
3. ### math

Ok, the problem says: a Middle school has 125 6th graders, 150 7th graders, and 100 8th graders. Which statement is NOT true?
4. ### math

mrs loya sponsers the spanish club at central middle school.the club has 8 members who are sixth graders,12 members who are sventh graders, 10 members who are eight graders. what percent of the spanish club members are seventh graders(what …
5. ### math

A soccer team consists of girls from sixth, seventh, and eighth grades. If 4/10 of the girls on the team are eighth graders and 5/10 are seventh graders, what fraction of the girls ae either seventh or eighth graders?
6. ### math

A soccer team consists of girls from sixth, seventh, and eighth grades. If 4/10 of the girls on the team are eighth graders and 5/10 are seventh graders, what fraction of the girls ae either seventh or eighth graders?
7. ### math

If there are 264 students in a school and there are 84 eighth graders and There are 22 fewer seventh graders than sixth graders. Then which grade has the most students and how many students are there.
8. ### Math

Need help on this question: There are 32 sixth graders and 44 seventh graders in the video gaming club. Which ration is greatest?