Marion used ²₅ of her pink stickers and ³₇ of her white stickers to decorate her diary. In the end, she had an equal number of pink stickers and white stickers left. Given that Marion had a total of 492 pink and white stickers at first, how many white stickers did she use to decorate the diary?

	Pink stickers	White stickers
Before	5x4 = 20 u	7x3 = 21 u
Change	- 2x4 = - 8 u	- 3x3 = - 9 u
After	3x4 = 12 u	4x3 = 12 u

The number of pink stickers and white stickers in the end is the same.  Make the number of pink stickers and white stickers in the end the same.  LCM of 3 and 4 is 12.

Total number of stickers that Marion used to decorate the diary
= 20 u + 21 u
= 41 u

41 u = 492

1 u = 492 ÷ 41 = 12

Number of white stickers that Marion used to decorate the diary
= 9 u
= 9 x 12
= 108

Answer(s): 108