The DENOMINATOR (bottom part) tells you into how many equal pieces you divide one unit. The NUMERATOR (top part) tells you how many of those pieces you actually use.
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A rational exponent is an exponent in the form of a fraction. Many financial formulas use rational exponents. Compound interest is formula that uses rational exponents.
Both the numerator and denominator are polynomials
An example is the 2/3 in 122/3.
1/3
Example: (4x)-2 The answer to this would be 1/ 16x2. Multiply it out as if the negative exponent was not there ((4x)2), then that will be the denominator of the fraction. The numerator is one.