Lynn's and Joelle's savings were in the ratio of 4 : 9. Both of them shared the cost of their older brother's present equally. Lynn's remaining savings was ¹₅ as much as Joelle's savings. What percentage of her savings did Joelle spend? Correct the answer to 1 decimal place.

	Lynn	Joelle	Difference
Before	4x4 = 16 u	9x4 = 36 u	5x4 = 20 u
Change	- 11 u	- 11 u
After	1x5 = 5 u	5x5 = 25 u	4x5 = 20 u

Since Lynn and Joelle shared the cost of their older brother's present equally, the amount each paid for the present is the same. 

So, the difference in the amounts between Lynn and Joelle at first and in the end remains the same.  Make the difference in the amounts between Lynn and Joelle at first and in the end the same. LCM of 5 and 4 is 20.

Amount that Joelle spent on the present
= 36 u - 25 u
= 11 u

Percentage of her savings that Joelle spent
= ¹¹₃₆ x 100%
≈ 30.6%

Answer(s): 30.6%