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Compare 1/18 and 21/8

1st number: 1/18, 2nd number: 2 5/8

1/18 is smaller than 21/8

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 8 is 72
  2. For the 1st fraction, since 18 × 4 = 72,
    1/18 = 1 × 4/18 × 4 = 4/72
  3. Likewise, for the 2nd fraction, since 8 × 9 = 72,
    21/8 = 21 × 9/8 × 9 = 189/72
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 4/72 < 189/72 or 1/18 < 21/8

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