Four boys, Andy, Ethan, Eric and Jenson saved some money. Ethan's savings was
12 of the total savings of Andy, Eric and Jenson. Andy's savings was 30% of the total savings. Eric's savings was
34 of the total savings of Ethan and Jenson. If Ethan's savings was $130, how much less was Eric's savings than the total of the other three boys?
Ethan |
Jenson |
Eric |
Andy |
Total |
1x10 |
2x10 |
3x10 |
7x3 |
3x3 |
10x3 |
4x3 |
3x3 |
|
|
10 u |
2 u |
9 u |
9 u |
30 u |
30% →
30100=
310 Andy's savings : Total savings = 3 : 10
Ethan's savings = 10 u
10 u = 130
1 u = 130 ÷ 10 = 13
Eric's savings = 9 u
Savings of the other three boys
= 10 u + 2 u + 9 u
= 21 u
Savings that Eric had less than the total of the three other boys
= 21 u - 9 u
= 12 u
= 12 x 13
= $156
Answer(s): $156