Nora is 10% heavier than Cody. Elyse is 20% lighter than Cody. Nora is 15 kg heavier than Elyse. What is Cody's mass?
| Nora |
Cody |
Elyse |
| 110% |
100% |
|
| |
100% |
80% |
| 11 u |
10 u |
8 u |
Nora's mass compared to Cody's mass in percent
= 100% + 10%
= 110%
Elyse's mass compared to Cody's mass in percent
= 100% - 20%
= 80%
110% =
110100 =
111080% =
80100 =
810Cody's mass is the repeated identity. Make Cody's mass the same.
Cody's mass = 10 u
Mass that Nora has more than Elyse
= 11 u - 8 u
= 3 u
3 u = 15
1 u = 15 ÷ 3 = 5
Cody's mass
= 10 u
= 10 x 5
= 50 kg
Answer(s): 50 kg
