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Compare 21/30 and 5/8

21/30 is greater than 5/8

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 8 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 8 × 15 = 120,
    5/8 = 5 × 15/8 × 15 = 75/120
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 84/120 > 75/120 or 21/30 > 5/8

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