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Answers.everydaycalculation.com » Compare fractions

Compare 21/30 and 28/40

21/30 is equivalent to 28/40

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 40 is 120
  2. For the 1st fraction, since 30 × 4 = 120,
    21/30 = 21 × 4/30 × 4 = 84/120
  3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
    28/40 = 28 × 3/40 × 3 = 84/120
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 84/120 = 84/120 or 21/30 = 28/40

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