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If I had some fractions, I might. But since I don't, I won't.
First add all the fractions together. Then, divide this sum by the total number of fractions that were in the set. This quotient is your average fraction.
All fractions are rational numbers because irrational numbers can't be expressed as fractions
Numerators
-- Find a common denominator. (It will be a number of which all three denominators are factors. The best choice is their least common multiple.) -- Change the fractions to their equivalents with the common denominator. -- Then add their numerators to get the numerator of their sum.