Express 4 7 as a rational number with denominator 21 - Vidyadip

Question

Express $\frac{4}{7}$ as a rational number with denominator 21

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Answer

Rational number $=\frac{4}{7}$
$21=7\times3$
$\therefore\frac{4}{7}=\frac{4\times3}{7\times3}=\frac{12}{21}$

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