percentages [measurement of area using background pictures] [map of Africa]

1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1% 1%

A 10 x 10 grid of 1% squares = 100 x 1% = 100% 1. Click on and count all of the squares with no colour 2. Click on and count all of the squares with more than half no colour 3. Click on and count all of the fully coloured squares 4. Click on and count all of the squares with more than half coloured 5. What percentage of the picture is Africa? 6. What percentage of the picture is sea?

This activity is to help you understand what percentages are. Here is a map of the continent of Africa with oceans and seas all around. What you are going to work out is what percentage of the picture is land [Africa] and what percentage of the picture is sea. The quiz on the right hand side is to help you with the working out. The two percentages added together will equal 100% [the whole picture]. To start the activity again just refresh the page.