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Vidya has 2 bottles of vinegar. She used 1 and a half bottles last week and used one fifth of a bottle today. How much vinegar is left in decimals?

(A) 0.1 (B) 0.5 (C) 0.2 (D) 0.3  

1 Answer

She started with 2 bottles and used up one and half last week. So she had $2 - 1\large\frac{1}{2}$$ = \large\frac{1}{2}$$ = 0.5$ bottle left.
She used up one fifth of a bottle today, which is $\large\frac{1}{5}$$ = 0.2$ bottle.
Therefore she has $0.5 - 0.2 = 0.3$ bottle left
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