Japheth, Tommy, Warren and Oscar paid a total of $135 for a souvenir. Oscar paid ⁴₅ of what the rest paid. Japheth paid 25% of what the rest paid. Tommy and Warren paid an equal amount of money. How much did Warren pay?

Japheth	Tommy	Warren	Oscar	Total
5x5			4x5	9x5
1x9	4x9			5x9
	1	1
9 u	8 u	8 u	20 u	45 u

25%= ²⁵₁₀₀= ¹₄
Japheth's share : Total share = 1 : 4

The total amount paid for the souvenir is repeated.  Make the total amount the same.  LCM of 9 and 5 is 45.

Amount that Tommy, Warren and Oscar paid = 36 u

Amount that Tommy and Warren paid
= 36 u - 20 u
= 16 u

The amount that Tommy and Warren each paid is the same.

Amount that Tommy and Warren each paid
= 16 u ÷ 2
= 8 u

Cost of the souvenir = 45 u

45 u = 135

1 u = 135 ÷ 45 = 3

Amount that Warren paid
= 8 u
= 8 x 3
= $24

Answer(s): $24