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Compare 15/90 and 21/49

15/90 is smaller than 21/49

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 49 is 4410
  2. For the 1st fraction, since 90 × 49 = 4410,
    15/90 = 15 × 49/90 × 49 = 735/4410
  3. Likewise, for the 2nd fraction, since 49 × 90 = 4410,
    21/49 = 21 × 90/49 × 90 = 1890/4410
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 735/4410 < 1890/4410 or 15/90 < 21/49

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