Four boys, Pierre, Riordan, Julian and Howard saved some money. Riordan's savings was
12 of the total savings of Pierre, Julian and Howard. Pierre's savings was 30% of the total savings. Julian's savings was
16 of the total savings of Riordan and Howard. If Riordan's savings was $100, how much less was Pierre's savings than the total of the other three boys?
| Riordan |
Howard |
Julian |
Pierre |
Total |
| 1x10 |
2x10 |
3x10 |
| 7x3 |
3x3 |
10x3 |
| 6x3 |
1x3 |
|
|
| 10 u |
8 u |
3 u |
9 u |
30 u |
30% →
30100=
310 Pierre's savings : Total savings = 3 : 10
Riordan's savings = 10 u
10 u = 100
1 u = 100 ÷ 10 = 10
Pierre's savings = 9 u
Savings of the other three boys
= 10 u + 8 u + 3 u
= 21 u
Savings that Pierre had less than the total of the three other boys
= 21 u - 9 u
= 12 u
= 12 x 10
= $120
Answer(s): $120
