Irene, Jaslyn, Min and Jen received a sum of money. Irene received ²₅ of the total amount of money Jaslyn, Min and Jen received. Jaslyn received ¹₄ of the total amount of money Min and Jen received. Min received ¹₅ as much money as Jen. If Jaslyn received $21 less than Irene, find the total sum of money the 4 girls received.

Irene	Jaslyn	Min	Jen	Total
2x3	5x3
	1x3	4x3
		1x2	5x2
6 u	3 u	2 u	10 u	21 u

The total amount that Min and Jen have is repeated.  Make the total amount that Min and Jen have the same.  LCM of 6 and 4 is 12.

The total amount that Jaslyn, Min and Jen have is repeated.  Make the total amount that Jaslyn, Min and Jen have the same. LCM of 5 and 5 is 15.

Amount that Jaslyn had less than Irene
= 6 u - 3 u
= 3 u

3 u = 21

1 u = 21 ÷ 3 = 7

Total sum of money that 4 girls received
= 6 u + 3 u + 2 u + 10 u 
= 21 u
= 21 x 7
= $147

Answer(s): $147