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Percentage of a Number

Express 90c...

Question

Express $90$ cm as a percent of $4.5$ m.

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Solution

$90$ cm as a percent of $4.5$ m
$90$ cm as a percent of $4.5 \times 100$ cm since $1$ m $= 100$ cm
$90$ cm as a percent of $450$ cm
$= \frac{90}{450} \times 100 = 20 %$

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