Common Fractions


Common fractions like (1/2,1/4,3/4) can be compared with other fractions.

  • A fraction is closest to 1/2 when the denominator is about twice the numerator.
  • A fraction is closest to 1/4 when the denominator is almost four times the numerator.


Which of the following fractions 2/9,7/8,2/5 is closest to each known fractions 1/2,1/4 and 3/4?

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2/9 is closer to 1/4,

7/8 is closer to 3/4,

And 2/5 is closer to 1/2.