One litre of water is evaporated from $6$ litres of a solution containing $4\%$ of sugar. The percentage of sugar in the remaining solution is:

Answer is C.

% of sugar = 4/100 * 6 = .24 litres

1 litre evaporated, so remaining 5 litres of solution

% of sugar contained in 5 litres of solution = $\frac{.24}{5}$*100 = 4.8% = $\frac{24}{5}$

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