The answer depends on what they are meant to be alike and different from!
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Unit rates are a special type of rates: those where the numerator or, more usually the denominator, of the rate is 1.
i think they are bothe fractions
They have the same numerator (1) but different denominators. Since the numerator is 1 in each fraction, it cannot be simplified therefore each unit fraction is in its simplest form. Then, because the denominators of any two of them are different the fractions must be different.
There are infinitely many different ways to make groups of fractions that sum to 1.
Convert unlike fractions to equivalent fractions with common denominators by finding the LCM of the denominators.