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Answers.everydaycalculation.com » Compare fractions

Compare 70/40 and 80/90

1st number: 1 30/40, 2nd number: 80/90

70/40 is greater than 80/90

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 90 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 40 × 9 = 360,
    70/40 = 70 × 9/40 × 9 = 630/360
  3. Likewise, for the 2nd fraction, since 90 × 4 = 360,
    80/90 = 80 × 4/90 × 4 = 320/360
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 630/360 > 320/360 or 70/40 > 80/90

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