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A period of 4 hours 30 minutes is what percent of a day

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$18 \frac{3}{4} %$

$16 \frac{2}{3} %$

20%

19%

answer is A.

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Detailed Solution

$\begin{array}{l} x % of 1440 = 270 (∵ 24 hrs = 1440 \min ., 4 hrs 30 \min . = 270 \min) \\ \frac{x}{100} \times 1440 = 270 \\ x = 270 \times \frac{100}{1440} = 18 \frac{3}{4} % \end{array}$

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