See Playground Percentages.
Help a town planner to design a site plan for a school. Using a 10×10 grid, design areas for two regions (playgrounds and classrooms) based on the percentages given. Assign the area for an additional six regions, using percentages of your choice. Observe the number line displaying equivalent fractions for the percentages used.
27 April 2010 Edit: 14 March 2021