Converting Fractions To Percentages, Converting Decimals To Percentages, Plotting Numbers On A Number Line Worksheet Page 13
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PERCENTAGE (Chapter 14)
G
SHADED REGIONS OF FIGURES
When we shade regions of figures to illustrate percentages, it is important that the region is
the correct size.
In some cases we may divide the figure into a number of equal parts, and then shade the
appropriate number of them.
Self Tutor
Example 10
For the given figure:
a
what fraction of the figure is unshaded
b
what percentage of the figure is unshaded?
3
There are 50 squares in total.
£ 100% = 60%
a
b
5
30 squares are unshaded.
So, 60% is unshaded.
30
3
=
So,
is unshaded.
50
5
When we divide up a circle, we need to remember there
o
are 360
in a full turn.
80%
Suppose we wish to shade 20% of a circle.
72°
o
o
o
If 100% is 360
then 1% is 3:6
and so 20% is 72
.
20%
EXERCISE 14G
1
Copy and complete the following table, filling in the shading where necessary:
Figure
Fraction shaded
Percentage shaded
Percentage unshaded
a
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3
b
4
c
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