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Answers.everydaycalculation.com » Compare fractions

Compare 81/63 and 90/70

1st number: 1 18/63, 2nd number: 1 20/70

81/63 is equivalent to 90/70

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 63 and 70 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 63 × 10 = 630,
    81/63 = 81 × 10/63 × 10 = 810/630
  3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
    90/70 = 90 × 9/70 × 9 = 810/630
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 810/630 = 810/630 or 81/63 = 90/70

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