Nicole has 25% as many pens as Kathy. Kathy has 130% as many pens as Barbara. If Kathy gives 66 pens to Barbara, both will then have an equal number of pens. Find the average number of pens the three of them have.

Nicole	Kathy	Barbara
1x13	4x13
	13x4	10x4
13 u	52 u	40 u

25% = ²⁵₁₀₀ = ¹₄
130% = ¹³⁰₁₀₀= ¹³₁₀

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

	Kathy	Barbara	Total
Before	52 u	40 u	92 u
Change	- 6 u	+ 6 u
After	46 u	46 u	92 u

Total number of pens that Kathy and Barbara have
= 52 u + 40 u
= 92 u

After Kathy gives to Barbara, both of them will have the same number of pens. 

The total number of pens that Kathy and Barbara have remains unchanged.

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

Number of pens that Kathy gives to Barbara
= 52 u - 46 u
= 6 u

6 u = 66

1 u = 66 ÷ 6 = 11

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

Average number of pens that each of them have
= 105 u ÷ 3
= 35 u
= 35 x 11
= 385

Answer(s): 385