Percentages

Introduction to percentages. A fraction expressed as the number of parts per hundred and recorded using the notation %.

Find a percentage of a given amount using mental methods and using a calculator.

Percentages of amounts can be represented diagrammatically using bar models.

How to calculate a percentage increase using the decimal method.

How to calculate a percentage decrease using the decimal method.

How to calculate a reverse percentage by finding the original amount after a percentage increase or decrease.

How to calculate the interest on an amount and the new total amount (original + interest) given the interest rate.