Step by step
The question
Question: make a circle graph of apples 20%, pears 30%, plums 50%.
apples 20%, pears 30%, plums 50%
A circle graph shows the parts of a whole as slices.
The whole circle is 360 degrees.
the whole circle = 360°
1 Each part of 360°
Apples is 20% of the circle.
20% is 0.2.
0.2 times 360 is 72°.
= apples: 20% × 360 = 0.2 × 360 = 72°
Careful!
A percent is out of 100.
Degrees are out of 360.
20% of the circle is 72°.
Careful: not 20% → 20° ✗
Pears: 30% of 360 is 108°.
= pears: 30% × 360 = 0.3 × 360 = 108°
Plums: 50% of 360 is 180°.
= plums: 50% × 360 = 0.5 × 360 = 180°
2 Draw the circle graph
We draw a circle and start at the top.
Apples: a slice of 72°, going round like a clock.
Then pears, 108°, and so on.
So the slices are apples 72°, pears 108° and plums 180°.
= apples 72°, pears 108°, plums 180°
3 Check
Let's check: the slices fill the circle: 72 plus 108 plus 180 is 360.
So the answer is right!
72 + 108 + 180 = 360
Let's look back.
First: each part of 360°.
Then: draw the circle graph.
Last: check.
Answer
= apples 72°, pears 108°, plums 180°