That is a natural and proper fraction to set as the limit within which we permit any gap.
He held out for a long time and maintained that the proper fraction was one-sixth, but ultimately he conceded one-eighth.
He promised to-day that he would produce facts and figures to show that that was a proper fraction.
These fractions can be found by the method of continued fractions: this arithmetical technique provides a series of progressively better approximations of any real numeric value by proper fractions.
