http://www.mathantics.com

Here is the video mentioned about converting Base-10 fractions:    • Math Antics - Converting Base-10 Frac...  
Here is the video mentioned about decimal numbers:    • Math Antics - Fractions and Decimals  
And here is the video mentioned about comparing fractions:    • Math Antics - Comparing Fractions  

Here we learn that you can use division to convert any fraction into its decimal form. The video clearly illustrates the 'long division' algorithm and also teaches the notation for expressing repeating decimal answers.

Math Antics is a web site featuring free math videos and more!