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ratio is a way to compare dierent quantities or amounts
A
in the same unit.
measured
like fractions, ratios can be simplied. Two ratios that can be
Just
to the same ratio are said to be equivalent:
simplied
proportional relationship can be represented using a graph, a
A
and an equation.
table
relationships are straight lines that pass through the
Proportional
(0, 0).
origin
Unit summary
Ratios can be written in a variety for forms, for example:
a : b fraction decimal percentage
3 : 4 0.75 75%
and
and
can both be simplied to . They are equivalent ratios.
Two equivalent ratios form a proportion, such as :
or 12 : 18 = 6 : 9
6
4
2
2
0
–2
–2
32 1 Ratios and proportions