a soccer club has 560 members so far 7/8 of the members have helped clean up their practice park. what percent of the members have helped clean up the park? how many members have helped clean up the park? show your work

Iam not sure , but probably 750 or 7.5

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.