Question
$\frac{2}{21}+\frac{3}{7}$
✓
Answer
21 is the multiple of 7. So making 21 as denominator of both the fractions.
$\frac{2}{21}+\frac{3 \times 3}{7 \times 3}=\frac{2}{21}+\frac{9}{21}$
$=\frac{2+9}{21}=\frac{11}{21}$
$\frac{11}{21}$
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