Lynn and Jen collected seashells. Lynn gave 30% of her seashells to Jen and as a result, Jen's seashells increased by 25%. If Lynn had 49 seashells left, find the number of seashells Jen should give to Lynn in the end so that both had an equal number of seashells.

	Lynn	Jen	Comparing the change in Jen's seashells
Before	10x1 = 10 u		4x3 = 12u
Change	- 3x1 = - 3 u	+ 3x1 = + 3 u	+ 1x3 = + 3 u
After	7x1 = 7 u		5x3 = 15 u

30% = ³⁰₁₀₀ = ³₁₀
25% = ²⁵₁₀₀ = ¹₄

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

7 u = 49

1 u = 49 ÷ 7 = 7

Number of seashells that Jen had more than Lynn in the end
= 15 u - 7 u
= 8 u

Number of seashells that Jen should give to Lynn so that both had an equal number of seashells in the end
= 8 u ÷ 2
= 4 u
= 4 x 7
= 28

Answer(s): 28