Question

How do you change powers with negative exponents to powers with positive exponents?

Answer 1

Comment
If you have a minus power in the denominator, the base and power go to the numerator. The number in front does not change where it is.

$\frac{y^2}{4x^-5}$

goes into something that looks like this
$\frac{y^2x^5}{4}$

When the minus power is in the numerator, the power and the base go into the denominator.

$\frac{3x^-3}{y}$

Becomes

$\frac{3}{x^3y}$

Numbers can do the same thing. if they have -powers associated with them.

$\frac{4^-3}{5^-2}$
becomes
$\frac{5^2}{4^3}$