Abi's and Barbara's savings were in the ratio of 2 : 7. Both of them shared the cost of their grandmother's souvenir equally. Abi's remaining savings was ¹₅ as much as Barbara's savings. What percentage of her savings did Barbara spend? Correct the answer to 1 decimal place.

	Abi	Barbara	Difference
Before	2x4 = 8 u	7x4 = 28 u	5x4 = 20 u
Change	- 3 u	- 3 u
After	1x5 = 5 u	5x5 = 25 u	4x5 = 20 u

Since Abi and Barbara shared the cost of their grandmother's souvenir equally, the amount each paid for the souvenir is the same. 

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

Amount that Barbara spent on the souvenir
= 28 u - 25 u
= 3 u

Percentage of her savings that Barbara spent
= ³₂₈ x 100%
≈ 10.7%

Answer(s): 10.7%