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At the bottom of the page there is an interactive quiz.

Activities 1

1.1)

Rewrite these 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 these 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 these 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 these per milles 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 $ $20$
b): $75$ % of $ $20$
c): $10$ % of 450 girls
d): $90$ % of 450 girls
e): $60$ % of $ $100$
f): $40$ % of $ $100$
g): $1$ % of $2200$ boys
h): $99$ % of $2200$ boys
i): $70$ % of $ $25$
j): $30$ % of $ $25$
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 sums of these pairs of answers from Activity 1.5)

a) + b)
c) + d)
e) + f)
g) + h)
i) + j)
k) + l)
m) + n)
o) + p)

Do you see a pattern?

You can find the solutions here.

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