Roshel is 30% heavier than Billy. Dana is 10% lighter than Billy. Roshel is 16 kg heavier than Dana. What is Billy's mass?
| Roshel |
Billy |
Dana |
| 130% |
100% |
|
| |
100% |
90% |
| 13 u |
10 u |
9 u |
Roshel's mass compared to Billy's mass in percent
= 100% + 30%
= 130%
Dana's mass compared to Billy's mass in percent
= 100% - 10%
= 90%
130% =
130100 =
131090% =
90100 =
910Billy's mass is the repeated identity. Make Billy's mass the same.
Billy's mass = 10 u
Mass that Roshel has more than Dana
= 13 u - 9 u
= 4 u
4 u = 16
1 u = 16 ÷ 4 = 4
Billy's mass
= 10 u
= 10 x 4
= 40 kg
Answer(s): 40 kg
