Yoko is 50% heavier than Rael. Natalie is 40% lighter than Rael. Yoko is 18 kg heavier than Natalie. What is Rael's mass?
| Yoko |
Rael |
Natalie |
| 150% |
100% |
|
| |
100% |
60% |
| 15 u |
10 u |
6 u |
Yoko's mass compared to Rael's mass in percent
= 100% + 50%
= 150%
Natalie's mass compared to Rael's mass in percent
= 100% - 40%
= 60%
150% =
150100 =
151060% =
60100 =
610Rael's mass is the repeated identity. Make Rael's mass the same.
Rael's mass = 10 u
Mass that Yoko has more than Natalie
= 15 u - 6 u
= 9 u
9 u = 18
1 u = 18 ÷ 9 = 2
Rael's mass
= 10 u
= 10 x 2
= 20 kg
Answer(s): 20 kg
