Invert the fraction so that the numerator and denominator are switched. For instance, assume you have the fraction 1/(5)^-3. You should invert the fraction, the exponent's base, so that it becomes 5/1, or simply 5.
Turn the negative exponent into a positive exponent. For instance, 5^-3 will now be a 5^3. The whole term would be 5^3/1
Reduce the exponent. Because exponents represent a number that is multiplied by itself, write out the multiplication breakdown or use a calculator to determine the result. For instance, 5^3 equals 5 x 5 x 5. So 5^3 equals 125.