Mrs Gan gave Vanessa and Kimberly some money each on Tuesday. On Wednesday, Vanessa gave ¹₄ of the amount she had to Kimberly. On Thursday, Kimberly gave ¹₅ of the amount she had to Vanessa. In the end, Vanessa had $36 and Kimberly had $24. How much did Kimberly had more than Vanessa at first?

	Vanessa	Kimberly	Total
Before 1	4 u	?	$60
Change 1	- 1 u	+ 1 u
After 1	3 u	5 p	$60
Before 2	$36 - 1 p	5 p	$60
Change 2	+ 1 p	- 1 p
After 2	$36	4 p ($24)	$60

Amount that Kimberly had in the end = 4 p

4 p = 24

1 p = 24 ÷ 4 = 6

Working backwards.

Amount that Vanessa had after giving to Kimberly on Wednesday
= 36 - 1 p
= 36 - 6
= $30

3 u = 30

1 u = 30 ÷ 3 = 10

Amount that Vanessa had at first
= 4 u
= 4 x 10
= $40

Total amount that Vanessa and Kimberly had 
= 36 + 24
= $60

Amount that Kimberly had at first
= 60 - 40
= $20

Amount that Vanessa had more than Kimberly
= 40 - 20 
= $20

Answer(s): $20