At first, Cole, Warren and Flynn had the same amount of money. After Flynn spent some of his money, Cole spent ³₈ of his money and Warren spent ²₃ of his money, Cole had $91 more than Warren. In the end, the total amount of money the three boys had left was $398. How much money did Flynn spend?

	Cole	Warren	Flynn	Total
Before	8x3 =  24 u	3x8 = 24 u	24 u
Change	- 3x3 = - 9 u	- 2x8 = - 16 u	- ?
After	5x3 = 15 u	1x8 = 8 u		$398

The amount that Cole and Warren each had at first is the same.  Make the amount that they each had the same.  LCM of 8 and 3 is 24.

Amount that Cole had more than Warren in the end
= 15 u - 8 u
= 7 u

7 u = 91

1 u = 91 ÷ 7 = 13

Amount that Cole and Warren had in the end
= 15 u + 8 u
= 23 u
= 23 x 13
= $299

Amount that Flynn had in the end
= 398 - 299
= $99

Amount that Flynn had at first
= 24 u
= 24 x 13
= $312

Amount that Flynn spent
= 312 - 99
= $213

Answer(s): $213