The fraction of Abigail's lunch money left is 2/3
Given:
let
Total money Abigail has = 3
Fraction spent on bus fare = 1/3
Fraction of lunch money left = Total money Abigail has - Fraction spent on bus fare
= 3 - 1/3
= (3 - 1) / 3
= 2/3
Check:
Total money = Fraction of lunch money left + Fraction spent on bus fare
= 2/3 + 1/3
= (2 + 1) / 3
= 3/3
= 1
Therefore, fraction of Abigail's lunch money left is 2/3
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