If they all have a common denominator, then list them from lowest to highest numerator.
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They are: 42.05, 42.09, 42.38 and 42.5 from least to greatest
You need at least one more fraction in order to have a common denominator.
There is no fraction that has a least value since it is always possible to find another fraction that is smaller.
It is a compound fraction.
greates common factor