Sarah and Tiffany used the same number of strawberries to bake cakes. Sarah used ²₅ of her strawberries and Tiffany used ³₇ of her strawberries. They had a total of 261 strawberries at first.

1. How many strawberries did each girl use?
2. How many strawberries did both girls have left altogether?

	Sarah	Tiffany	Total
Before	5x3 = 15 u	7x2 = 14 u	29 u
Change	- 2x3 = - 6 u	- 3x2 = - 6 u
After	3x3 = 9 u	4x2 = 8 u	17 u

(a)
Sarah and Tiffany used the same number of strawberries to bake cakes.  Make the numerators the same. LCM of 2 and 3 is 6. 
2x35x3 of Mary's strawberries = 3x27x2 of Tiffany's strawberries 
615 of Mary's strawberries = 614 of Tiffany's strawberries 

Total number of strawberries at first
= 15 u + 14 u
= 29 u

29 u = 261

1 u = 261 ÷ 29 = 9

Number of strawberries that each girl used
= 6 u
= 6 x 9
= 54 

(b)
Total number of strawberries that both girls had left 
= 9 u + 8 u
= 17 u
= 17 x 9
= 153

Answer(s): (a) 54; (b) 153