Gillian is 40% heavier than Julian. Nora is 30% lighter than Julian. Gillian is 21 kg heavier than Nora. What is Julian's mass?
| Gillian |
Julian |
Nora |
| 140% |
100% |
|
| |
100% |
70% |
| 14 u |
10 u |
7 u |
Gillian's mass compared to Julian's mass in percent
= 100% + 40%
= 140%
Nora's mass compared to Julian's mass in percent
= 100% - 30%
= 70%
140% =
140100 =
141070% =
70100 =
710Julian's mass is the repeated identity. Make Julian's mass the same.
Julian's mass = 10 u
Mass that Gillian has more than Nora
= 14 u - 7 u
= 7 u
7 u = 21
1 u = 21 ÷ 7 = 3
Julian's mass
= 10 u
= 10 x 3
= 30 kg
Answer(s): 30 kg
