Simplify the rational expression. 
Definitions:
Registered Voters
Individuals who have officially enrolled on an electoral roll, enabling them to participate in elections.
Missoula, Montana
A city in the U.S. state of Montana, known for its natural beauty and as the home to the University of Montana.
Cluster Samples
A sampling technique where the population is divided into groups, or clusters, and a sample of these clusters is selected for study.
Population Members
Individuals or items that make up the complete set being studied in a statistical analysis.
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