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Subtract 8/70 from 81/21

1st number: 3 18/21, 2nd number: 8/70

81/21 - 8/70 is 131/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 70 is 210
  2. For the 1st fraction, since 21 × 10 = 210,
    81/21 = 81 × 10/21 × 10 = 810/210
  3. Likewise, for the 2nd fraction, since 70 × 3 = 210,
    8/70 = 8 × 3/70 × 3 = 24/210
  4. Subtract the two fractions:
    810/210 - 24/210 = 810 - 24/210 = 786/210
  5. After reducing the fraction, the answer is 131/35
  6. In mixed form: 326/35

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