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Subtract 70/40 from 40/28

1st number: 1 12/28, 2nd number: 1 30/40

40/28 - 70/40 is -9/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 40 is 280
  2. For the 1st fraction, since 28 × 10 = 280,
    40/28 = 40 × 10/28 × 10 = 400/280
  3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
    70/40 = 70 × 7/40 × 7 = 490/280
  4. Subtract the two fractions:
    400/280 - 490/280 = 400 - 490/280 = -90/280
  5. After reducing the fraction, the answer is -9/28

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