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Answer

Method 1 :
(a)
Aaron : 40%
Benny + Charles : 3 x Charles + Charles = 4 x Charles ——- 60%
Charles ——- 60%/4 = 15%

(b)
Benny ——- 3 x 15% = 45%
45% – 40% = 5% ——- 29
1% ——- 29/5 = 5.8
100% ——- 100 x 5.8 = 580

Method 2 :
Total sum of money : 100u
Aaron : 40u
Benny : (20u – 29) x 3 or 40u + 29
Charles : 20u – 29

40u + 29 ——- (20u – 29) x 3 = 60u – 87
60u – 40u = 20u ——- 29 + 87 = 116
1u ——- 116/20 = 5.8
100u ——- 100 x 5.8 = 580 (b)

20u – 29 ——- 20 x 5.8 – 29 = 87
(87/580) x 100% = 15% (a)

Ans : (a) 15%; (b) $580.

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