Application of Number
Level 2
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Pie Charts - Tutorial 2
| Example 2 |
Watch the animation below to learn about another basic pie chart.
These pie charts so far have been split into easy to recognise sections, like ½ or ¼. The diagrams below show these.
 |
This pie chart is split into two halfs. |
 |
This pie chart is split into 4 quarters. |
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This pie chart is split into 8 eighths. |
Remember pie charts show proportions. So you need to know the total amount and also the size of the fraction for each segment.
| Music Sales Example |
Look at the diagram of music format sales.
This pie chart shows the proportion of sales for the different music formats.
CDs account for half of the
total sales.
Tapes account for a quarter of the total sales.
Records and Mini Discs account for one eighth each.
NOTE the pie chart does not actually tell us how many were actually sold, only the proportions.
This table shows us what would happen if different total amounts were sold.
| Total Sales | CDs (Half) |
Tapes (Quarter) |
Mini
Discs (Eighth) |
Records (Eighth) |
| 800 | 400 | 200 | 100 | 100 |
| 1000 | 500 | 250 | 125 | 125 |
| 8000 | 4000 | 2000 | 1000 | 1000 |
| 1,000,000 | 500,000 | 250,000 | 125,000 | 125,000 |
| 40,000,000 | 20,000,000 | 10,000,000 | 5,000,000 | 5,000,000 |
So, for example, to find the exact amount of tapes sold you would need to know the total sales and then find a quarter of that.
To practise working with basic pie charts try this assessment.
Then go on to the next tutorial.
Or click below to go back to the main menu.
