Step by step
The question
Question: make a circle graph of walk 50%, bus 25%, car 25%.
A circle graph shows the parts of a whole as slices.
The whole circle is 360 degrees.
1 Each part of 360°
Walk is 50% of the circle.
50% is 0.5.
0.5 times 360 is 180°.
Careful!
A percent is out of 100.
Degrees are out of 360.
50% of the circle is 180°.
Bus: 25% of 360 is 90°.
Car: 25% of 360 is 90°.
2 Draw the circle graph
We draw a circle and start at the top.
Walk: a slice of 180°, going round like a clock.
Then bus, 90°, and so on.
So the slices are walk 180°, bus 90° and car 90°.
3 Check
Let's check: the slices fill the circle: 180 plus 90 plus 90 is 360.
So the answer is right!
Let's look back.
First: each part of 360°.
Then: draw the circle graph.
Last: check.