Elyse used ²₇ of her yellow stickers and ³₄ of her silver stickers to decorate her diary. In the end, she had an equal number of yellow stickers and silver stickers left. Given that Elyse had a total of 189 yellow and silver stickers at first, how many silver stickers did she use to decorate the diary?

	Yellow stickers	Silver stickers
Before	7x1 = 7 u	4x5 = 20 u
Change	- 2x1 = - 2 u	- 3x5 = - 15 u
After	5x1 = 5 u	1x5 = 5 u

The number of yellow stickers and silver stickers in the end is the same.  Make the number of yellow stickers and silver stickers in the end the same.  LCM of 5 and 1 is 5.

Total number of stickers that Elyse used to decorate the diary
= 7 u + 20 u
= 27 u

27 u = 189

1 u = 189 ÷ 27 = 7

Number of silver stickers that Elyse used to decorate the diary
= 15 u
= 15 x 7
= 105

Answer(s): 105