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Answers.everydaycalculation.com » Compare fractions

Compare 42/20 and 84/90

1st number: 2 2/20, 2nd number: 84/90

42/20 is greater than 84/90

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 90 is 180

    Next, find the equivalent fraction of both fractional numbers with denominator 180
  2. For the 1st fraction, since 20 × 9 = 180,
    42/20 = 42 × 9/20 × 9 = 378/180
  3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
    84/90 = 84 × 2/90 × 2 = 168/180
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 378/180 > 168/180 or 42/20 > 84/90

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