Question

2 1/3 + 5 2/7 =

• A. 7 3/10
• B. 7 13/21
• C. 10 2/21
• D. 10 3/10

Answer 1

Answer:

B. 7 13/21

$2\frac{1}{3} +5\frac{2}{7}$ = $\frac{2\times3+1}{3}+\frac{5\times7+2}{7}$

=7/3 + 37/7

= $\frac{7\times7+37\times3}{7\times3}$

=160/21

=$7\frac{13}{21}$