The Percentage Bar

percentage bar.

'The Percentage Bar' provides students with a model for visualising calculations involving finding percentages of amounts.

There are two types of problems provided: either finding a percentage of an amount when the total amount is given, or finding the total amount when the discounted amount is given.


The tool presents a bar to represent the number, and a line to represent percentages of that number. Your students are guided to locate the unknown percentage on the percentage line, and then to find the number on the bar that corresponds to it. They can enter other percentages, and their corresponding values in the tool to help them with their calculations.

Feedback is provided to help students locate the percentage, and to find the correct solution.