Divide each by 9
36 ÷ 9 = 4
27 ÷ 9 = 3
4/3 is your answer since you can't simplify that anymore
It would be, 33%.
Hope this helps!
A + b + c = 168
b = 1/3c
a = b + c....a = 1/3c + c = 4/3c
now we sub
4/3c + 1/3c + c = 168
8/3c = 168
c = 168 * 3/8
c = 504/8
c = 63 <=== Carlos collected 63 lbs
a = 4/3c
a = 4/3(63)
a = 252/3
a = 84 <== Amy collected 84 lbs
b = 1/3c
b = 1/3(63)
b = 63/3 <== Bruce collected 21 lbs
b = 21
1x24, 2x12, 3x8 are 3 ways that get 24