Hello!
[tex]\boxed{ \bf The~fraction~is~5/100~or~1/20~when~reduced.}[/tex]
There are 100 centimetres in a metre. So, our denominator will be 100.
The numerator is 5 because that is the number of centimetres.
⇒ [tex]\frac{5}{100}[/tex]
This fraction can be reduced, since 5 goes into the denominator evenly.
5 ÷ 5 = 1
100 ÷ 5 = 20
So, our reduced fraction is [tex]\frac{1}{20}[/tex]