Jade and Yen collected seashells. Jade gave 60% of her seashells to Yen and as a result, Yen's seashells increased by 20%. If Jade had 16 seashells left, find the number of seashells Yen should give to Jade in the end so that both had an equal number of seashells.

	Jade	Yen	Comparing the change in Yen's seashells
Before	5x1 = 5 u		5x3 = 15u
Change	- 3x1 = - 3 u	+ 3x1 = + 3 u	+ 1x3 = + 3 u
After	2x1 = 2 u		6x3 = 18 u

60% = ⁶⁰₁₀₀ = ³₅
20% = ²⁰₁₀₀ = ¹₅

The increase in the number of seashells that Yen had is repeated.  Make the increase in the number of seashells that Yen had the same. LCM of 3 and 1 = 3

2 u = 16

1 u = 16 ÷ 2 = 8

Number of seashells that Yen had more than Jade in the end
= 18 u - 2 u
= 16 u

Number of seashells that Yen should give to Jade so that both had an equal number of seashells in the end
= 16 u ÷ 2
= 8 u
= 8 x 8
= 64

Answer(s): 64