The Logic of Percentages

Materials: Handouts, percentage sheets, markers

Step 1:

¨ Actively read Section 6.2 on percents in Bassarear. pp. 322-329

¨ Actively read "Percentages" from Math for Fun.

¨ Actively read "Paint by Numbers" from Games magazine.

¨ Create "Paint by Numbers" puzzles for the designs in Math for Fun.

¨ How can you tell what percentage of the squares will be colored in a "Paint by Numbers" puzzle before you start the puzzle?

¨ If you take a 10x10 grid of squares and cut the squares in half with a diagonal line, how does that change the percentages you can represent? What about two diagonal lines?