Cindy has 25% as many marbles as Yen. Yen has 130% as many marbles as Wendy. If Yen gives 24 marbles to Wendy, both will then have an equal number of marbles. Find the average number of marbles the three of them have.

Cindy	Yen	Wendy
1x13	4x13
	13x4	10x4
13 u	52 u	40 u

25% = ²⁵₁₀₀ = ¹₄
130% = ¹³⁰₁₀₀= ¹³₁₀

The number of marbles that Cindy has is repeated.  Make the number of marbles that Cindy has the same. LCM of 4 and 13 is 52.

	Yen	Wendy	Total
Before	52 u	40 u	92 u
Change	- 6 u	+ 6 u
After	46 u	46 u	92 u

Total number of marbles that Yen and Wendy have
= 52 u + 40 u
= 92 u

After Yen gives to Wendy, both of them will have the same number of marbles. 

The total number of marbles that Yen and Wendy have remains unchanged.

Number of marbles that each of them will have
= 92 u ÷ 2
= 46 u

Number of marbles that Yen gives to Wendy
= 52 u - 46 u
= 6 u

6 u = 24

1 u = 24 ÷ 6 = 4

Total number of marbles that three of them have
= 92 u + 13 u
= 105 u

Average number of marbles that each of them have
= 105 u ÷ 3
= 35 u
= 35 x 4
= 140

Answer(s): 140