To reduce this fraction, you must know the rules of dividing variables with exponents. If you divide a variable with an exponent by the same variable with an exponent, then you must subtract the exponents & attach it to the variable.
V^(4-5) * w^(6-6)
This becomes v^-1 * w^0. Any number raised to the zero power is 1. This leaves the answer v^-1 or 1/v.