This site offers an excellent, common-sense explanation of percentages and provides many worked out problems.
This description of a site outside SERC has not been vetted by SERC staff and may be incomplete or incorrect. If you
have information we can use to flesh out or correct this record let us know.
Subject: Mathematics Resource Type: Activities:Classroom Activity, Problem Set Special Interest: Quantitative Grade Level: College Lower (13-14), High School (9-12) Quantitative Skills: Fractions and Ratios