Method I
Kojo's percentage relative to Afua
=100%+20%=120%Afua's percentage
=100%120%=6kg100%==5.0kgNote: One of the zeros ( 0 ) in 100\% and 120\% cancels each other, 6 divides itself once and 12, 2 times. 2 divides itself once and 10, 5 times.
Method I
Let
x= Afua's weight
Kojo's weight more than Afua
=6−xPercentage
=×100%Kojo's percentage more than Afua
=| Kojo's weight more than Afua |
| Afua's weight |
×100%Kojo's percentage more than Afua
=×100%But Kojo's percentage more than Afua
=20%×100%=20%Solve for the value of
x Get rid of the fraction by multiplying both sides of the equation by the denominator
x(6−x)×100=20×x6×100−x×100=20×x600−100x=20x600=20x+100x600=120xDivide both sides by 120 to solve for
xx==5Afua's weight
=5.0kg