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Subtract 20/40 from 12/7

1st number: 1 5/7, 2nd number: 20/40

12/7 - 20/40 is 17/14.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 40 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 7 × 40 = 280,
    12/7 = 12 × 40/7 × 40 = 480/280
  3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
    20/40 = 20 × 7/40 × 7 = 140/280
  4. Subtract the two like fractions:
    480/280 - 140/280 = 480 - 140/280 = 340/280
  5. After reducing the fraction, the answer is 17/14
  6. In mixed form: 13/14

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