# Explore featured tools

How-to-sheets you can use to give your students the confidence to use mathematics across learning areas and in their day-to-day lives. ### Calculating mean, median and mode

Mean The ‘mean’ is the total of the numbers divided by how many numbers there

• General resources ### Calculating percentages or ratios

Introduction to ratios Ratios are used to compare a value to an ‘original’ or

• General resources ### Calculating percentage change

Percentage change definition/calculation The ratio calculation in Calculating

• General resources ### Calculating income tax

Individual income tax rates vary depending on who the payee is. Australian

• General resources You can set up a spreadsheet to perform repeated calculations. This is useful

• General resources ### Building charts and tables

Tables and charts serve as visual representations of datasets. Tables

• General resources ### Calculating GST at 10 percent

The goods and services tax (GST) is a broad-based tax of 10% on most goods and

• General resources ### Making an Excel spreadsheet using GST as an example

You can set up a spreadsheet to perform repeated calculations. This is useful

• General resources ### Tiered pricing and commission

Tiered pricing and percentage systems Businesses which involve sales (selling

• General resources ### Calculating income

Image: Table showing hourly rates of pay for permanent retail employees. Level

• General resources ### Building charts and tables

Tables and charts serve as visual representations of datasets. Tables

• General resources