Tiffany, Erika and Ivory shared $600 among themselves. Erika and Ivory shared ²₅ of the money equally. After Erika gave away some of her money to Tiffany, Ivory had 3 times as much money as Erika. How much money did Erika give to Tiffany?

	Erika	Ivory	Tiffany	Total
Before	1x3 = 3 u	1x3 = 3 u	3x3 = 9 u	15 u
Change	- 2 u	No change	+ 2 u
After	1x1 = 1 u	3x1 = 3 u	11 u	15 u

Erika and Ivory shared ²₅ of the money equally.

Fraction of the money that Erika and Ivory each had
= ²₅ ÷ 2
= ²₅ x ¹₂
= ¹₅

The amount that Ivory had remains unchanged.  The amount that Ivory had is the unchanged quantity. Make the amount that Ivory had the same. LCM of 1 and 3 is 3.

The amount that Erika and Ivory had at first is the same.

Total amount that they had at first
= 3 u + 3 u + 9 u
= 15 u

15 u = 600

1 u = 600 ÷ 15 = 40

Amount that Erika gave to Tiffany
= 3 u - 1 u
= 2 u
= 2 x 40
= $80

Answer(s): $80