Math - Developmental Math: Converting Fractions to Decimals to Percents

Videos:

• Khan Academy allows you to enroll (it is FREE) and then you can sign up for a course or look for various materials. 
• DIYMaths has videos and material covering many topics in this course.

 Written materials:

• MathIsFun.com   has material on many topics for the course under Pre-algebra and Algebra.
• PurpleMath.com has an index of its lessons which covers this course and others.
• CoolMath.com has lessons under its Pre-algebra and Algebra headings.