Riordan, Oscar, Andy and Perry shared $528. Perry received ⁵₆ of the total amount of money received by Riordan, Oscar and Andy. Riordan received ⁴₅ of the total amount for Oscar and Andy. Oscar received ¹₃ as much money as Andy. If Oscar gave all his money to Perry, how much did Perry have more than Riordan in the end?

Riordan	Oscar	Andy	Perry	Total
6x6			5x6	11x6
4x4	5x4
	1x5	3x5
16 u	5 u	15 u	30 u	66 u

The total amount that Oscar and Andy have is repeated.  Make the total amount of Oscar and Andy the same.  LCM of 4 and 5 is 20.

The total amount that Riordan, Oscar and Andy have is repeated.  Make the total amount of Riordan, Oscar and Andy the same. LCM of 36 and 6 is 36.

Total amount that Riordan, Oscar, Andy and Perry shared = 66 u

66 u = 528

1 u = 528 ÷ 66 = 8

	Riordan	Oscar	Andy	Perry
Before	16 u	5 u	15 u	30 u
Change		- 5 u		+ 5 u
After	16 u	0 u	15 u	35 u

Amount that Perry had if Oscar gave him all his money
= 30 u + 5 u
= 35 u

Amount that Perry had more than Riordan
= 35 u - 16 u
= 19 u
= 19 x 8
= $152

Answer(s): $152