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Subtract 10/48 from 20/42

20/42 - 10/48 is 15/56.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 48 is 336

    Next, find the equivalent fraction of both fractional numbers with denominator 336
  2. For the 1st fraction, since 42 × 8 = 336,
    20/42 = 20 × 8/42 × 8 = 160/336
  3. Likewise, for the 2nd fraction, since 48 × 7 = 336,
    10/48 = 10 × 7/48 × 7 = 70/336
  4. Subtract the two like fractions:
    160/336 - 70/336 = 160 - 70/336 = 90/336
  5. After reducing the fraction, the answer is 15/56

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