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Subtract 20/40 from 42/7

1st number: 6 0/7, 2nd number: 20/40

42/7 - 20/40 is 11/2.

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,
    42/7 = 42 × 40/7 × 40 = 1680/280
  3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
    20/40 = 20 × 7/40 × 7 = 140/280
  4. Subtract the two like fractions:
    1680/280 - 140/280 = 1680 - 140/280 = 1540/280
  5. After reducing the fraction, the answer is 11/2
  6. In mixed form: 51/2

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