Ivory's and Yoko's savings were in the ratio of 4 : 9. Both of them shared the cost of their father's gift equally. Ivory's remaining savings was ²₅ as much as Yoko's savings. What percentage of her savings did Yoko spend? Correct the answer to 1 decimal place.

	Ivory	Yoko	Difference
Before	4x3 = 12 u	9x3 = 27 u	5x3 = 15 u
Change	- 2 u	- 2 u
After	2x5 = 10 u	5x5 = 25 u	3x5 = 15 u

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

So, the difference in the amounts between Ivory and Yoko at first and in the end remains the same.  Make the difference in the amounts between Ivory and Yoko at first and in the end the same. LCM of 5 and 3 is 15.

Amount that Yoko spent on the gift
= 27 u - 25 u
= 2 u

Percentage of her savings that Yoko spent
= ²₂₇ x 100%
≈ 7.4%

Answer(s): 7.4%