Download: http://archive.info-mac.org/edu/percent-o-rama.hqx
Percent-O-Rama
Middle-School (grades 5 through 9) math program written to provide skills in
context. Students use mental math and proportional thinking to find common
percentages (10% 5% 1% 15%, etc.) of a given number. Go to
www.polymathlove.com for more free programs.