Help with easy math homework?

Question

so i guess this is easy but i forget how to do it... if you could explain how to, cuz this is an example problem, and i kinda need to be able to do more than just this one...ty

ratio of girls to boys is 6:7 there are 1,352 people. how many are girls?

Thank you SO much

Answer 1

You could set up a proportion using girls and total people as the fraction parts.

6..........x............6.......x

----- = -------- ==> --- = -------

6+7....1352........13....1352

Now cross-multiply and solve.

13x=6*1352

13x = 8112

x = 624

Or in this case the first denominator goes into the second denominator exactly 104 times, so the first numerator can be multiplied by 104 to find "x".

(6/13)*(104/104) = 624/1352

answer: 624 girls

Answer 2

total girls and boys  = 13

compare the girls to the total students

girls/students the ratio is

6 / 13 =  x / 1352 cross multiply

13 * x = 6 * 1352

13x = 8112

x = 8112/13 ===> 624 girls

Answer 3

= 1,352(6/[6 + 7])

= 1,352(6/13)

= (1,352/13)(6/[13/13])

= 104(6)

= 624

Answer: 624 are the girls

Proof (ratio is 6:7):

= 624:1,352 - 624

= 624:728

= 624/104:728/104

= 6:7

Answer 4

the way i do it is i take 6 + 7

and that = 13

take 1352 divided by 13

that = 104

since you're looking for the number of girls you take 104 x 6

= 624

Answer 5

So ratios are like two parts of one thing. 6 'parts' of 1352 are girls and 7 'parts' are guys. TO figure this out just see how much 'parts are in all. In this case 6+7= 13, so 13 is the whole. 6/13s are girls and 7/13s are guys. Now all you have to do is divide 1352 by 13 to see how much is 1/13, then multiply by the respectives ratio of the girls

ex:1/13 of 1352 is __

__x 6= #of girls