Question
Find $\frac{5}{63}-\left(-\frac{6}{21}\right)$
✓
Answer
$\frac{5}{63}-\left(-\frac{6}{21}\right)=\frac{5}{63}+\frac{6}{21}$
As denominators are different we find the $LCM$ of $21 \& 63$
$LCM$ of $63$ and $21$ is $63.$
$\frac{6}{21}=\frac{6 \times 3}{21 \times 3}=\frac{18}{63}$
Thus,
$\frac{5}{63}+\frac{6}{21}=\frac{5}{63}+\frac{18}{63}=\frac{5+18}{63}=\frac{23}{63}$
As denominators are different we find the $LCM$ of $21 \& 63$
$LCM$ of $63$ and $21$ is $63.$
$\frac{6}{21}=\frac{6 \times 3}{21 \times 3}=\frac{18}{63}$
Thus,
$\frac{5}{63}+\frac{6}{21}=\frac{5}{63}+\frac{18}{63}=\frac{5+18}{63}=\frac{23}{63}$
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