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Subtract 20/21 from 75/4

1st number: 18 3/4, 2nd number: 20/21

75/4 - 20/21 is 1495/84.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 21 is 84
  2. For the 1st fraction, since 4 × 21 = 84,
    75/4 = 75 × 21/4 × 21 = 1575/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    20/21 = 20 × 4/21 × 4 = 80/84
  4. Subtract the two fractions:
    1575/84 - 80/84 = 1575 - 80/84 = 1495/84
  5. In mixed form: 1767/84

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