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Subtract 70/12 from 30/28

1st number: 1 2/28, 2nd number: 5 10/12

30/28 - 70/12 is -100/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 12 is 84
  2. For the 1st fraction, since 28 × 3 = 84,
    30/28 = 30 × 3/28 × 3 = 90/84
  3. Likewise, for the 2nd fraction, since 12 × 7 = 84,
    70/12 = 70 × 7/12 × 7 = 490/84
  4. Subtract the two fractions:
    90/84 - 490/84 = 90 - 490/84 = -400/84
  5. After reducing the fraction, the answer is -100/21

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