2. ‘per cent’ means per hundred
% Percentages %
What does percent mean?
‘per cent’ means per hundred
% means /100
So 50% means 50 out of 100

3. To change a percentage to a fraction
Percentages already are fractions: always fractions of 100:
20% means
Next step: simplify: 20
100 20
100 2 10 1 5 = =

5. 50
100 70
100 28
100 5
100 35
100 20
100 1
100 80
100 90
100 6
100 64
100 2
100 22
100 4
100 15
100

6. 1 2 7 10 7 25 1 20 7 20 1 5 1
100 4 5 9 10 3 50 16 25 1 50 11 50 1 25 3 20

8. 25% 8%
16%
10%
85%
98%
75%
30%
96%
40%
34%
60%
18%
45%
95%

9. What are the most important percentages to remember?