Question
Subtract:$\frac{2}{7}$ from $\frac{19}{21}$
✓
Answer
$\frac{19}{21}-\frac{2}{7}$
$LCM$ of $21$ and $7$ is $21$, so we will convert each fraction into an equivalent fraction with denominator $21$.
$=\frac{19\times1}{21\times1}-\frac{2\times3}{7\times3}$
$=\frac{19}{21}-\frac{6}{21}$
$=\frac{19-6}{21}$
$=\frac{13}{21}$
$LCM$ of $21$ and $7$ is $21$, so we will convert each fraction into an equivalent fraction with denominator $21$.
$=\frac{19\times1}{21\times1}-\frac{2\times3}{7\times3}$
$=\frac{19}{21}-\frac{6}{21}$
$=\frac{19-6}{21}$
$=\frac{13}{21}$
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