# How do you simplify (p^4t^-3)/(r^-2)?

Something on the bottom line of a fraction can be moved to the top line if we change the sign of its exponent: ${p}^{4} {t}^{-} 3 {r}^{2}$. This is correct, but it is better to write pronumerals in alphabetical order: ${p}^{4} {r}^{2} {t}^{-} 3$.