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Answers.everydaycalculation.com » Compare fractions

Compare 45/21 and 72/18

1st number: 2 3/21, 2nd number: 4 0/18

45/21 is smaller than 72/18

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 18 is 126

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 21 × 6 = 126,
    45/21 = 45 × 6/21 × 6 = 270/126
  3. Likewise, for the 2nd fraction, since 18 × 7 = 126,
    72/18 = 72 × 7/18 × 7 = 504/126
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 270/126 < 504/126 or 45/21 < 72/18

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