Victoria used ⁵₇ of her pink stickers and ³₇ of her brown stickers to decorate her diary. In the end, she had an equal number of pink stickers and brown stickers left. Given that Victoria had a total of 189 pink and brown stickers at first, how many brown stickers did she use to decorate the diary?

	Pink stickers	Brown stickers
Before	7x2 = 14 u	7x1 = 7 u
Change	- 5x2 = - 10 u	- 3x1 = - 3 u
After	2x2 = 4 u	4x1 = 4 u

The number of pink stickers and brown stickers in the end is the same.  Make the number of pink stickers and brown stickers in the end the same.  LCM of 2 and 4 is 4.

Total number of stickers that Victoria used to decorate the diary
= 14 u + 7 u
= 21 u

21 u = 189

1 u = 189 ÷ 21 = 9

Number of brown stickers that Victoria used to decorate the diary
= 3 u
= 3 x 9
= 27

Answer(s): 27