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Compare 21/84 and 5/8

21/84 is smaller than 5/8

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 8 is 168
  2. For the 1st fraction, since 84 × 2 = 168,
    21/84 = 21 × 2/84 × 2 = 42/168
  3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
    5/8 = 5 × 21/8 × 21 = 105/168
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 42/168 < 105/168 or 21/84 < 5/8

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