one-ninth


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Noun1.one-ninth - one part in nine equal parts
common fraction, simple fraction - the quotient of two integers
References in classic literature ?
In point of fact, in its apogee the moon is 247,552 miles, and in its perigee, 218,657 miles only distant; a fact which makes a difference of 28,895 miles, or more than one-ninth of the entire distance.