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Year 8 Interactive Maths - Second Edition


Finding the Ratio of Two Quantities

We must express both quantities in the same unit of measurement to find the ratio of two quantities in its simplest form.


Example 2

Find the ratio of 45 centimetres to 2 metres in its simplest form.

Solution:

 


Note:

We can use ratios to compare more than two quantities conveniently.  Fractions are not usually suitable for this.


Example 3

Find the ratio of 250 m to 1 km in its simplest form.

Solution:


Example 4

Find the ratio of 54 minutes to 2 hours in its simplest form.

Solution:


Example 5

Find the ratio of 60 days to 1 year in its simplest form.  Assume the year is a non-leap year.

Solution:


Example 6

Find the ratio of 350 millilitres to 1.5 litres in its simplest form.

Solution:


Example 7

Find the ratio of 475 milligrams to 2 kilograms in its simplest form.

Solution:


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