$3$ of $20$ is what percent $?$

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Solution

We know that
$\frac{P a r t (i s)}{W h o l e (o r)} = \frac{P e r c e n t}{100}$
Given part $= 3$ whole $= 20$
$∴ \frac{3}{20} = \frac{P e r c e n t}{100}$
Cross multiply.
$3 \times 100 = P e r c e n t \times 20 P e r c e n t = \frac{3 \times 100}{20} P e r c e n t = 15 %$
Hence, percent of $20$ is $3$ is $15 %$

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