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Compare 21/4 and 7/21

1st number: 5 1/4, 2nd number: 7/21

21/4 is greater than 7/21

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 21 is 84
  2. For the 1st fraction, since 4 × 21 = 84,
    21/4 = 21 × 21/4 × 21 = 441/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    7/21 = 7 × 4/21 × 4 = 28/84
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 441/84 > 28/84 or 21/4 > 7/21

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