PSLE
At first, Zara had an equal number of yellow and pink marbles . She gave away ²₃ of her yellow marbles and some pink marbles. In the end, she was left with ³₅ of her marbles. What fraction of the pink marbles did Zara give away?

	Yellow	Pink	Total
Comparing yellow marbles and pink marbles at first	1x3x5 = 15 u	1x3x5 =  15 u	2x3x5 =  30 u
Before	3x5 = 15 u	15 u	5x6 = 30 u
Change	- 2x5 = - 10 u	- 2 u	- 3x6 = - 12 u
After	1x5 = 5 u	13 u	2x6 = 18 u

After1_x5 =
5 u
13 u2_x6 =
18 u
The number of yellow marbles at first is repeated. Make the number of yellow marbles the first the same. LCM of 3 and 1 is 3.

The total number of marbles at first is repeated. Make the total number of marbles at first the same. LCM of 6 and 5 is 30.

Number of pink marbles that Zara was left with
= 18 u - 5 u
= 13 u

Number of pink marbles that Zara gave away
= 15 u - 13 u
= 2 u

Fraction of the pink marbles that Zara gave away = ²₁₅

Answer(s): ²₁₅