Question

Simplify: (3 ^−1 × 7 ^−1 ) ÷ 9^ −1

Answer 1

$( {3}^{ - 1} \times {7}^{ - 1}) \div {9}^{ - 1}$

$( \frac{1}{3} \times \frac{1}{7} ) \: \div \frac{1}{9}$

$( \frac{1}{21} ) \div \frac{1}{9}$

$\frac{1}{21} \times 9$

$\frac{3}{7}$