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Activities 1

1.1)

Rewrite the percentages into fractions where the denominators are 100:

a)
25 %
b)
15 %
c)
10 %
d)
1 %
e)
100 %
f)
50 %
g)
60 %
h)
70 %
i)
75 %

a)
25 %
b)
15 %
c)
10 %
d)
1 %
e)
100 %
f)
50 %
g)
60 %
h)
70 %
i)
75 %

1.2)

Write the percentages as the simplest possible fraction:

a)
25 %
b)
15 %
c)
10 %
d)
1 %
e)
100 %
f)
50 %
g)
60 %
h)
70 %
i)
75 %

a)
25 %
b)
15 %
c)
10 %
d)
1 %
e)
100 %
f)
50 %
g)
60 %
h)
70 %
i)
75 %

1.3)

Write the percentages both as decimal numbers and as fractions where the denominators are 100:

a)
25 %
b)
75 %
c)
10 %
d)
90 %
e)
100 %
f)
0 %
g)
35 %
h)
65 %

a)
25 %
b)
75 %
c)
10 %
d)
90 %
e)
100 %
f)
0 %
g)
35 %
h)
65 %

1.4)

Write the per mille into fractions with denominators of 1000:

a)
250
b)
150
c)
10
d)
1
e)
1000
f)
100
g)
600
h)
70
i)
700

a)
250
b)
150
c)
10
d)
1
e)
1000
f)
100
g)
600
h)
70
i)
700

1.5)

Find the requested parts and simplify the answers as much as possible. Remember the units!

a)
25 % of $200
b)
75 % of $200
c)
10 % of 450 girls
d)
90 % of 450 girls
e)
60 % av $1000
f)
40 % of $1000
g)
1 % of 2200 boys
h)
99 % of 2200 boys
i)
70 % of $250
j)
30 % of $250
k)
75 % of 300 students
l)
25 % of 300 students
m)
25 % of 8 footballs
n)
75 % of 8 footballs
o)
100 % of 8 footballs
p)
0 % of 8 footballs

a)
25 % of $200
b)
75 % of $200
c)
10 % of 450 girls
d)
90 % of 450 girls
e)
60 % av $1000
f)
40 % of $1000
g)
1 % of 2200 boys
h)
99 % of 2200 boys
i)
70 % of $250
j)
30 % of $250
k)
75 % of 300 students
l)
25 % of 300 students
m)
25 % of 8 footballs
n)
75 % of 8 footballs
o)
100 % of 8 footballs
p)
0 % of 8 footballs

1.6)

Find the sum of the pairs of answers from Activity 1.5)

Do you see a pattern?

You can find the solutions here.

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Converting Percentages to Decimals Numbers