Four boys, Liam, Flynn, David and Ian saved some money. Flynn's savings was
711 of the total savings of Liam, David and Ian. Liam's savings was 10% of the total savings. David's savings was
45 of the total savings of Flynn and Ian. If Flynn's savings was $770, how much less was David's savings than the total of the other three boys?
| Flynn |
Ian |
David |
Liam |
Total |
| 7x5 |
11x5 |
18x5 |
| 9x9 |
1x9 |
10x9 |
| 5x9 |
4x9 |
|
|
| 35 u |
10 u |
36 u |
9 u |
90 u |
10% →
10100=
110 Liam's savings : Total savings = 1 : 10
Flynn's savings = 35 u
35 u = 770
1 u = 770 ÷ 35 = 22
David's savings = 36 u
Savings of the other three boys
= 35 u + 10 u + 9 u
= 54 u
Savings that David had less than the total of the three other boys
= 54 u - 36 u
= 18 u
= 18 x 22
= $396
Answer(s): $396
