3.2.1 Try some yourself
Activity 20
Convert each of the following to percentages. Round off the percentages to whole numbers.
(a)
(i) 0.8
(ii) 0.21
(iii) 0.70
(iv) 2.4
(b)
(i)
(ii)
(iii)
(iv)
Answer
(a)
(i) 0.8 = 80%
(ii) 0.21 = 21%
(iii) 0.70 = 70%
(iv) 2.4 = 240%
(b)
(i)
= 0.5= 50%(ii)
= 0.125=12.5% 
13%(iii)
0.1111 11%(iv)
1.143 114%
Activity 21
In the election in Example 11 the Average party gets 2100 votes. In the previous election they had 10%. Find the swing.
Answer
2100 out of 5000 is
× 100% = 42%.
The swing is 42 − 10 = 32 percentage points.