# How do you reduce 1.2km : 400 m?

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This is a ratio which if you so chose is permissible to write in fraction FORMAT. Do not confuse this with a fraction

So write

Known that 1 km is the same as 1000 m. So we can convert the Km into m so that both values are using the same units of measurement.

The

Remember that this is a ratio

So 1.2 km : 400 m is the same as 3 : 1

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Describe your changes (optional) 200

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Firstly change the

the units now cancel and can be omitted.

now cancel the numbers by their common factors

Describe your changes (optional) 200