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Answers.everydaycalculation.com » Compare fractions

Compare 18/70 and 30/80

18/70 is smaller than 30/80

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 80 is 560
  2. For the 1st fraction, since 70 × 8 = 560,
    18/70 = 18 × 8/70 × 8 = 144/560
  3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
    30/80 = 30 × 7/80 × 7 = 210/560
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 144/560 < 210/560 or 18/70 < 30/80

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