Irene used ⁴₇ of her pink stickers and ²₇ of her silver stickers to decorate her diary. In the end, she had an equal number of pink stickers and silver stickers left. Given that Irene had a total of 448 pink and silver stickers at first, how many silver stickers did she use to decorate the diary?

	Pink stickers	Silver stickers
Before	7x5 = 35 u	7x3 = 21 u
Change	- 4x5 = - 20 u	- 2x3 = - 6 u
After	3x5 = 15 u	5x3 = 15 u

The number of pink stickers and silver stickers in the end is the same.  Make the number of pink stickers and silver stickers in the end the same.  LCM of 3 and 5 is 15.

Total number of stickers that Irene used to decorate the diary
= 35 u + 21 u
= 56 u

56 u = 448

1 u = 448 ÷ 56 = 8

Number of silver stickers that Irene used to decorate the diary
= 6 u
= 6 x 8
= 48

Answer(s): 48