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Subtract 84/45 from 5/21

1st number: 5/21, 2nd number: 1 39/45

5/21 - 84/45 is -57/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 45 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 21 × 15 = 315,
    5/21 = 5 × 15/21 × 15 = 75/315
  3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
    84/45 = 84 × 7/45 × 7 = 588/315
  4. Subtract the two like fractions:
    75/315 - 588/315 = 75 - 588/315 = -513/315
  5. After reducing the fraction, the answer is -57/35

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