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Subtract 98/45 from 9/21

1st number: 9/21, 2nd number: 2 8/45

9/21 - 98/45 is -551/315.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 45 is 315
  2. For the 1st fraction, since 21 × 15 = 315,
    9/21 = 9 × 15/21 × 15 = 135/315
  3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
    98/45 = 98 × 7/45 × 7 = 686/315
  4. Subtract the two fractions:
    135/315 - 686/315 = 135 - 686/315 = -551/315

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