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

	Jade	Cindy	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 Jade and Cindy shared the cost of their uncle's present equally, the amount each paid for the present is the same. 

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

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

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

Answer(s): 30.6%