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

	Yoko	Min	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 Yoko and Min shared the cost of their younger sister's present equally, the amount each paid for the present is the same. 

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

Amount that Yoko spent on the present
= 8 u - 3 u
= 5 u

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

Answer(s): 62.5%