1/10: decimetre; 1/100: centimetre; 1/1000: millimetre. Smaller fractions tend to be used only by particle physicists!
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A metre is a measure of distance in 1-dimensional space. A fraction is a dimensionless number. You cannot convert one to the other.
You use fractions (or some variation, such as decimals) in any situation where whole numbers are not sufficient. For example, when you want to measure the object of a length in meters, and a whole number of meters is not precise enough.
Then they have the same units. As a comparison, if you want to add different units of length, for instance meters and centimeters, you have to convert everything to meters (or everything to centimeters), before you add it.
the different types of fractions are:-proper fractionimproper fractionmixed fraction
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