To change a percentage to a fraction :
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 = =
Slide 5:
50
100 20
100 1
100 2
100 4
100 15
100 6
100 80
100 5
100 70
100 28
100 35
100 90
100 64
100 22
100
Slide 6:
1
2 1
5 1
100 1
50 1
25 3
20 3
50 4
5 1
20 7
10 7
25 7
20 9
10 16
25 11
50
Slide 8:
25% 10% 75% 40% 18% 45% 34% 30% 85% 8% 16% 98% 96% 60% 95%
Slide 9:
What are the most important percentages to remember?