Julie's and Ivory's savings were in the ratio of 4 : 7. Both of them shared the cost of their younger brother's gift equally. Julie's remaining savings was ¹₅ as much as Ivory's savings. What percentage of her savings did Ivory spend? Correct the answer to 1 decimal place.

	Julie	Ivory	Difference
Before	4x4 = 16 u	7x4 = 28 u	3x4 = 12 u
Change	- 13 u	- 13 u
After	1x3 = 3 u	5x3 = 15 u	4x3 = 12 u

Since Julie and Ivory shared the cost of their younger brother's gift equally, the amount each paid for the gift is the same. 

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

Amount that Ivory spent on the gift
= 28 u - 15 u
= 13 u

Percentage of her savings that Ivory spent
= ¹³₂₈ x 100%
≈ 46.4%

Answer(s): 46.4%