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Answers.everydaycalculation.com » Compare fractions

Compare 30/21 and 21/45

1st number: 1 9/21, 2nd number: 21/45

30/21 is greater than 21/45

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 45 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 21 × 15 = 315,
    30/21 = 30 × 15/21 × 15 = 450/315
  3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
    21/45 = 21 × 7/45 × 7 = 147/315
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 450/315 > 147/315 or 30/21 > 21/45

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