Question

what is the sum of 1/3 and 2/7

Answer 1

$\frac{1}{3} + \frac{2}{7} \\ \\ = \frac{1 \times 7 + 2 \times 3}{21} \\ \\ = \frac{7 + 6}{21} \\ \\ = \frac{13}{21}$

Answer 2

Answer:

=1/3+2/7

=21(1/3)+21(2/7)

=7+6

=11