80% of the mochi balls in Packet N were strawberry mochi balls and the rest were banana mochi balls. Packet P had 30% more strawberry mochi balls than Packet N and twice as many mochi balls than the total number of mochi balls in Packet N. Find the percentage of the banana mochi balls in Packet P that would need to be transferred into Packet N, so that there were an equal number of strawberry and banana mochi balls in Packet N.

	Packet N		Packet P
	Strawberry	Banana	Strawberry	Banana
	5 u		10 u
Before	4 u	1 u	5.2 u	4.8 u
Change		+ 3 u		- 3 u
After	4 u	4 u	5.2 u	1.8 u

80% = ⁸⁰₁₀₀ = ⁴₅
100 %+ 30% = 130%

 Total number of mochi balls in Packet N
= 4 u + 1 u
= 5 u

Total number of mochi balls in Packet P
= 2 x 5 u 
= 10 u

Number of strawberry mochi balls in Packet P
= 130% x 4 u
=  ¹³⁰₁₀₀ x 4 u
= 5.2 u

Number of strawberry mochi balls in Packet P
= 10 u - 5.2 u
= 4.8 u

Number of banana mochi balls to be transferred from Packet P to Packet N
= 4 u - 1 u
= 3 u

Percentage of mochi balls to be transferred from Packet P
= ³_4.8 x 100%
= 62.5%

Answer(s): 62.5%