Answer:
1cm:100cm
Explanation:
You have to convert the ratio into the same unit (I chose cm). If there are 100cm in a metre, there will be 300cm in 3m.
That leaves you with the ratio 3cm:300cm. To simplify, divide both sides by three leaving you with 1cm:100cm
1 : 100
The quantities must be in the same units , that is
3 m = 3 × 100 cm = 300 cm , then
3 cm : 100 cm ( divide both parts by 3 )
= 1 : 100
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