PSLE
At first, Yoko had an equal number of red and purple stickers . She gave away ²₅ of her red stickers and some purple stickers. In the end, she was left with ²₃ of her stickers. What fraction of the purple stickers did Yoko give away?

	Red	Purple	Total
Comparing red stickers and purple stickers at first	1x5x3 = 15 u	1x5x3 =  15 u	2x5x3 =  30 u
Before	5x3 = 15 u	15 u	3x10 = 30 u
Change	- 2x3 = - 6 u	- 4 u	- 2x10 = - 10 u
After	3x3 = 9 u	11 u	1x10 = 20 u

After3_x3 =
9 u
11 u1_x10 =
20 u
The number of red stickers at first is repeated. Make the number of red stickers the first the same. LCM of 5 and 1 is 5.

The total number of stickers at first is repeated. Make the total number of stickers at first the same. LCM of 10 and 3 is 30.

Number of purple stickers that Yoko was left with
= 20 u - 9 u
= 11 u

Number of purple stickers that Yoko gave away
= 15 u - 11 u
= 4 u

Fraction of the purple stickers that Yoko gave away = ⁴₁₅

Answer(s): ⁴₁₅