Question

Which expression is equal to 6rs^9/42r^5s^2

Answer 1

$\dfrac{6rs^9}{42r^5s^2}=\dfrac{6}{42}\cdot\dfrac{r}{r^5}\cdot\dfrac{s^9}{s^2}=\dfrac{1}{7}\cdot\dfrac{1}{r^4}\cdot\dfrac{s^7}{1}=\boxed{\dfrac{s^7}{7r^4}}$