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1/3 = 4/12  (Gracelyn)

1/4 = 3/12 (Hilda) 

Savings of each girl is represented by 12 units. 

4/12 – 3/12 = 1/12 

1 unit –> $32.50 

12 units –> $32.50 x 12 = $390 (Ans) 

 

 

 

 

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