Using Percentages

20% of the 350 pupils are borders at a particular school catch the school bus home. How many borders are there?

The Answer

Expressing one quantity as a percentage of another

A new healthy snack bar called “Fibre-crunch" is being sold in the shops. Each bar weighs 40g and contains 2g of protein, 3g of fat and 35g of carbohydrate. What percentage of protein, fat and carbohydrate does "Fibre-crunch" contain?

The Answer

Using percentages for GST calculations

The letters GST stand for Goods and Service Tax, which is a tax, added on to the price of lots of the things that you can buy.

Most shops include GST in their prices, so that the price you see on the label is all of what you pay to buy it. Other shops and services do not include it in their price so you have to calculate the GST and then add it on to get the final price you have to pay.

The current rate of GST is 12.5%.

Mr and Mrs McDonald buy a new TV from their local wholesalers. The price on the label is $600, but they know they have to add GST onto this price. How much would Mr and Mrs McDonald have to pay for the TV?

The Answer