Sites to train your math skills!

https://www.ixl.com/math/grade-5/percent-of-a-number

http://www.mathabc.com/math-5th-grade/percentage/how-much-discount-do-you-get/id/392

https://www.khanacademy.org/math/pre-algebra/decimals-pre-alg/percent-intro-pre-alg/v/taking-a-percentage-example

Math Antics - Finding A Percent Of A Number

How to Find the Percent of a Number