Gem's and Jen's savings were in the ratio of 2 : 5. Both of them shared the cost of their auntie's gift equally. Gem's remaining savings was ¹₅ as much as Jen's savings. What percentage of her savings did Gem spend? Correct the answer to 1 decimal place.

	Gem	Jen	Difference
Before	2x4 = 8 u	5x4 = 20 u	3x4 = 12 u
Change	- 5 u	- 5 u
After	1x3 = 3 u	5x3 = 15 u	4x3 = 12 u

Since Gem and Jen shared the cost of their auntie's gift equally, the amount each paid for the gift is the same. 

So, the difference in the amounts between Gem and Jen at first and in the end remains the same.  Make the difference in the amounts between Gem and Jen at first and in the end the same. LCM of 3 and 4 is 12.

Amount that Gem spent on the gift
= 8 u - 3 u
= 5 u

Percentage of her savings that Gem spent
= ⁵₈ x 100%
≈ 62.5%

Answer(s): 62.5%