Eric and Ian have some pink markers and some green markers. The number of green markers Eric has is equal to the number of pink markers Ian has. ¹₅ of Eric's markers are pink and ¹₆ of Ian's markers are green. There are a total of 225 pink markers. Find the total number of markers they have.

Eric		Ian		Total
Pink	Green	Pink	Green
	1x20	1x20
1x5	4x5	5x4	1x4
5 u	20 u	20 u	4 u	49 u

The number of Eric's green markers and Ian's pink markers is the same.

The number of Eric's green markers is repeated. The number of Ian's pink markers is repeated.  Make the number of Eric's green markers and Ian's pink markers the same.  LCM of 4 and 5 is 20.

Number of pink markers
= 5 u + 20 u
= 25 u

25 u = 225

1 u = 225 ÷ 25 = 9

Total number of markers
= 5 u + 20 u + 20 u + 4 u
= 49 u
= 49 x 9
= 441

Answer(s): 441