Four boys, Gabriel, Billy, Japheth and Michael saved some money. Billy's savings was
12 of the total savings of Gabriel, Japheth and Michael. Gabriel's savings was 10% of the total savings. Japheth's savings was
18 of the total savings of Billy and Michael. If Billy's savings was $390, how much less was Gabriel's savings than the total of the other three boys?
| Billy |
Michael |
Japheth |
Gabriel |
Total |
| 1x10 |
2x10 |
3x10 |
| 9x3 |
1x3 |
10x3 |
| 8x3 |
1x3 |
|
|
| 10 u |
14 u |
3 u |
3 u |
30 u |
10% →
10100=
110 Gabriel's savings : Total savings = 1 : 10
Billy's savings = 10 u
10 u = 390
1 u = 390 ÷ 10 = 39
Gabriel's savings = 3 u
Savings of the other three boys
= 10 u + 14 u + 3 u
= 27 u
Savings that Gabriel had less than the total of the three other boys
= 27 u - 3 u
= 24 u
= 24 x 39
= $936
Answer(s): $936
