Question

evaluate
$\frac{ {7}^{ - 1} \times {5}^{ - 1} }{7 \times {4}^{ - 1} }$
​

Answer 1

Answer:

$\frac{ {7}^{ - 1} \times {5}^{ - 1} }{7 \times {4}^{ - 1} } \\ = \frac{ 4 }{7 \times 7 \times 5} \\ = \frac{4}{49 \times 5} \\ = \frac{4}{245}$