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Subtract 12/21 from 35/20

1st number: 1 15/20, 2nd number: 12/21

35/20 - 12/21 is 33/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 21 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 20 × 21 = 420,
    35/20 = 35 × 21/20 × 21 = 735/420
  3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
    12/21 = 12 × 20/21 × 20 = 240/420
  4. Subtract the two like fractions:
    735/420 - 240/420 = 735 - 240/420 = 495/420
  5. After reducing the fraction, the answer is 33/28
  6. In mixed form: 15/28

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