This foldable covers the three common proportions problems; algebraic, real world, and similar polygons. All three flaps have a bit of a reminder that relates to the flap.
This is a summary of solving proportions (and not in-depth notes) because my students had geometry last year...and are currently in Algebra 1. So, this should be a review for them. Simply flip the 2nd page over and copy them back to back. Students will then fold the paper in half and cut on the 2 lines to separate the 3 flaps.