The company Quia has an online game you could play to help you memorize your fraction-decimal-percentage equivalents. Harcourt School Publishers has some products (to help with equivalents) you can preview if you register (for free, I think) on their site (I didn’t, so I could not check out the products). NCTM’s Illuminations has a circle(s) that is shaded to show you a given fraction-decimal-percentage equivalent. The site MathisFun.com has some multiplication drills.
Thanks to Mary H. and her son Colby for telling me about these!