Games:
Jeopardy:
http://www.math-play.com/Fractions-Decimals-Percents-Jeopardy/fractions-decimals-percents-jeopardy.html
Millionaire:
http://www.math-play.com/Changing-Fractions-and-Decimals-to-Percents/changing-fractions-and-decimals-to-percents-millionaire.html
Sale Shopping Game:
http://www.mathplayground.com/Percent_Shopping.html
Video example:
https://www.khanacademy.org/math/pre-algebra/fractions-pre-alg/decimals-fractions-pre-alg/v/representing-a-number-as-a-decimal-percent-and-fraction
Fraction-Decimal-Percent Online Converter:
http://www.asapercentage.com/