Linda and Jade collected seashells. Linda gave 50% of her seashells to Jade and as a result, Jade's seashells increased by 30%. If Linda had 15 seashells left, find the number of seashells Jade should give to Linda in the end so that both had an equal number of seashells.

	Linda	Jade	Comparing the change in Jade's seashells
Before	2x3 = 6 u		10x1 = 10u
Change	- 1x3 = - 3 u	+ 1x3 = + 3 u	+ 3x1 = + 3 u
After	1x3 = 3 u		13x1 = 13 u

50% = ⁵⁰₁₀₀ = ¹₂
30% = ³⁰₁₀₀ = ³₁₀

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

3 u = 15

1 u = 15 ÷ 3 = 5

Number of seashells that Jade had more than Linda in the end
= 13 u - 3 u
= 10 u

Number of seashells that Jade should give to Linda so that both had an equal number of seashells in the end
= 10 u ÷ 2
= 5 u
= 5 x 5
= 25

Answer(s): 25