Risa is 10% heavier than Brandon. Nicole is 20% lighter than Brandon. Risa is 6 kg heavier than Nicole. What is Brandon's mass?
| Risa |
Brandon |
Nicole |
| 110% |
100% |
|
| |
100% |
80% |
| 11 u |
10 u |
8 u |
Risa's mass compared to Brandon's mass in percent
= 100% + 10%
= 110%
Nicole's mass compared to Brandon's mass in percent
= 100% - 20%
= 80%
110% =
110100 =
111080% =
80100 =
810Brandon's mass is the repeated identity. Make Brandon's mass the same.
Brandon's mass = 10 u
Mass that Risa has more than Nicole
= 11 u - 8 u
= 3 u
3 u = 6
1 u = 6 ÷ 3 = 2
Brandon's mass
= 10 u
= 10 x 2
= 20 kg
Answer(s): 20 kg
