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

	Pamela	Fanny	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 Pamela and Fanny shared the cost of their younger brother's souvenir equally, the amount each paid for the souvenir is the same. 

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

Amount that Pamela spent on the souvenir
= 16 u - 3 u
= 13 u

Percentage of her savings that Pamela spent
= ¹³₁₆ x 100%
≈ 81.3%

Answer(s): 81.3%