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Subtract 40/70 from 81/7

1st number: 11 4/7, 2nd number: 40/70

81/7 - 40/70 is 11/1.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 70 is 70
  2. For the 1st fraction, since 7 × 10 = 70,
    81/7 = 81 × 10/7 × 10 = 810/70
  3. Likewise, for the 2nd fraction, since 70 × 1 = 70,
    40/70 = 40 × 1/70 × 1 = 40/70
  4. Subtract the two fractions:
    810/70 - 40/70 = 810 - 40/70 = 770/70
  5. After reducing the fraction, the answer is 11/1

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