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Subtract 1/21 from 45/28

1st number: 1 17/28, 2nd number: 1/21

45/28 - 1/21 is 131/84.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 21 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 28 × 3 = 84,
    45/28 = 45 × 3/28 × 3 = 135/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    1/21 = 1 × 4/21 × 4 = 4/84
  4. Subtract the two like fractions:
    135/84 - 4/84 = 135 - 4/84 = 131/84
  5. In mixed form: 147/84

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