Question

What is the common ratio of 1/2, 1/10, 1/50, 1/250, 1/1250?

Answer 1

$r=\frac{\frac{1}{10}}{\frac{1}{2}}=\frac{1}{10} \times 2= \frac{2}{10}=\frac{1}{5} \\ \\ \boxed{r=\frac{1}{5}}$