Yen has 25% as many erasers as Jen. Jen has 130% as many erasers as Min. If Jen gives 60 erasers to Min, both will then have an equal number of erasers. Find the average number of erasers the three of them have.

Yen	Jen	Min
1x13	4x13
	13x4	10x4
13 u	52 u	40 u

25% = ²⁵₁₀₀ = ¹₄
130% = ¹³⁰₁₀₀= ¹³₁₀

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

	Jen	Min	Total
Before	52 u	40 u	92 u
Change	- 6 u	+ 6 u
After	46 u	46 u	92 u

Total number of erasers that Jen and Min have
= 52 u + 40 u
= 92 u

After Jen gives to Min, both of them will have the same number of erasers. 

The total number of erasers that Jen and Min have remains unchanged.

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

Number of erasers that Jen gives to Min
= 52 u - 46 u
= 6 u

6 u = 60

1 u = 60 ÷ 6 = 10

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

Average number of erasers that each of them have
= 105 u ÷ 3
= 35 u
= 35 x 10
= 350

Answer(s): 350