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Subtract 4/7 from 10/20

10/20 - 4/7 is -1/14.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 7 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 20 × 7 = 140,
    10/20 = 10 × 7/20 × 7 = 70/140
  3. Likewise, for the 2nd fraction, since 7 × 20 = 140,
    4/7 = 4 × 20/7 × 20 = 80/140
  4. Subtract the two like fractions:
    70/140 - 80/140 = 70 - 80/140 = -10/140
  5. After reducing the fraction, the answer is -1/14

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