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Compare 7/28 and 5/21

7/28 is greater than 5/21

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 21 is 84
  2. For the 1st fraction, since 28 × 3 = 84,
    7/28 = 7 × 3/28 × 3 = 21/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    5/21 = 5 × 4/21 × 4 = 20/84
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 21/84 > 20/84 or 7/28 > 5/21

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