Mrs Choy gave Gabby and Sabrina some money each on Monday. On Tuesday, Gabby gave ¹₆ of the amount she had to Sabrina. On Wednesday, Sabrina gave ¹₅ of the amount she had to Gabby. In the end, Gabby had $41 and Sabrina had $24. How much did Sabrina had more than Gabby at first?

	Gabby	Sabrina	Total
Before 1	6 u	?	$65
Change 1	- 1 u	+ 1 u
After 1	5 u	5 p	$65
Before 2	$41 - 1 p	5 p	$65
Change 2	+ 1 p	- 1 p
After 2	$41	4 p ($24)	$65

Amount that Sabrina had in the end = 4 p

4 p = 24

1 p = 24 ÷ 4 = 6

Working backwards.

Amount that Gabby had after giving to Sabrina on Tuesday
= 41 - 1 p
= 41 - 6
= $35

5 u = 35

1 u = 35 ÷ 5 = 7

Amount that Gabby had at first
= 6 u
= 6 x 7
= $42

Total amount that Gabby and Sabrina had 
= 41 + 24
= $65

Amount that Sabrina had at first
= 65 - 42
= $23

Amount that Gabby had more than Sabrina
= 42 - 23 
= $19

Answer(s): $19