Question

What number should we divide -10/21 to get -2/3. ????????

Answer 1

Let the number that should be divided be x.

$- \frac{10}{21} \div x = \frac{ - 2}{3} \\ - \frac{10}{21} \times x = - \frac{3}{2} \\ - \frac{10}{21} \times - \frac{3}{2} = x \\ - \frac{30}{42} = x \\ - \frac{5}{7} = x$

So -5/7 should get divided to get -2/3