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Subtract 10/28 from 2/21

2/21 - 10/28 is -11/42.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 21 × 4 = 84,
    2/21 = 2 × 4/21 × 4 = 8/84
  3. Likewise, for the 2nd fraction, since 28 × 3 = 84,
    10/28 = 10 × 3/28 × 3 = 30/84
  4. Subtract the two like fractions:
    8/84 - 30/84 = 8 - 30/84 = -22/84
  5. After reducing the fraction, the answer is -11/42

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