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Answers.everydaycalculation.com » Compare fractions

Compare 10/42 and 70/80

10/42 is smaller than 70/80

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 80 is 1680
  2. For the 1st fraction, since 42 × 40 = 1680,
    10/42 = 10 × 40/42 × 40 = 400/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    70/80 = 70 × 21/80 × 21 = 1470/1680
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 400/1680 < 1470/1680 or 10/42 < 70/80

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