This packet covers the rules of dividing exponents. There is a powerpoint of definitions and terms, examples shown for you, and examples for you to do on your own.
Source: Greene
This video shows you the quotient of powers property when dividing exponents.
This video gives you more help on dividing powers.
Here is a link to several examples of dividing exponents.
http://www.regentsprep.org/Regents/math/ALGEBRA/AO5/rule_pdiv.htm