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Subtract 21/32 from 10/42

10/42 - 21/32 is -281/672.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 32 is 672

    Next, find the equivalent fraction of both fractional numbers with denominator 672
  2. For the 1st fraction, since 42 × 16 = 672,
    10/42 = 10 × 16/42 × 16 = 160/672
  3. Likewise, for the 2nd fraction, since 32 × 21 = 672,
    21/32 = 21 × 21/32 × 21 = 441/672
  4. Subtract the two like fractions:
    160/672 - 441/672 = 160 - 441/672 = -281/672

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