Circle graph: red 30%, blue 45%, green 25%

Step by step

The question

Question: make a circle graph of red 30%, blue 45%, green 25%.

A circle graph shows the parts of a whole as slices.

The whole circle is 360 degrees.

1 Each part of 360°

Red is 30% of the circle.

30% is 0.3.

0.3 times 360 is 108°.

Careful!

A percent is out of 100.

Degrees are out of 360.

30% of the circle is 108°.

Blue: 45% of 360 is 162°.

Green: 25% of 360 is 90°.

2 Draw the circle graph

We draw a circle and start at the top.

Red: a slice of 108°, going round like a clock.

Then blue, 162°, and so on.

So the slices are red 108°, blue 162° and green 90°.

3 Check

Let's check: the slices fill the circle: 108 plus 162 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.