Four boys, Justin, Zane, Ethan and Riordan saved some money. Zane's savings was
45 of the total savings of Justin, Ethan and Riordan. Justin's savings was 20% of the total savings. Ethan's savings was
13 of the total savings of Zane and Riordan. If Zane's savings was $620, how much less was Justin's savings than the total of the other three boys?
Zane |
Riordan |
Ethan |
Justin |
Total |
4x5 |
5x5 |
9x5 |
4x9 |
1x9 |
5x9 |
3x9 |
1x9 |
|
|
20 u |
7 u |
9 u |
9 u |
45 u |
20% →
20100=
15 Justin's savings : Total savings = 1 : 5
Zane's savings = 20 u
20 u = 620
1 u = 620 ÷ 20 = 31
Justin's savings = 9 u
Savings of the other three boys
= 20 u + 7 u + 9 u
= 36 u
Savings that Justin had less than the total of the three other boys
= 36 u - 9 u
= 27 u
= 27 x 31
= $837
Answer(s): $837