Raeann used ²₇ of her white stickers and ³₄ of her pink stickers to decorate her diary. In the end, she had an equal number of white stickers and pink stickers left. Given that Raeann had a total of 270 white and pink stickers at first, how many pink stickers did she use to decorate the diary?

	White stickers	Pink 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 white stickers and pink stickers in the end is the same.  Make the number of white stickers and pink stickers in the end the same.  LCM of 5 and 1 is 5.

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

27 u = 270

1 u = 270 ÷ 27 = 10

Number of pink stickers that Raeann used to decorate the diary
= 15 u
= 15 x 10
= 150

Answer(s): 150