Question

1. The product of two rational numbers is -3/7. If one of the number is 5/21, find the other no?​

Answer 1

Let the other number be x

$\frac{5}{21} * x = \frac{-3}{7} \\x = \frac{\frac{-3}{7} }{\frac{5}{21} } \\x = \frac{-3}{7} * \frac{21}{5} \\x = \frac{-9}{5}$