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Subtract 3/40 from 18/7

1st number: 2 4/7, 2nd number: 3/40

18/7 - 3/40 is 699/280.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 40 is 280
  2. For the 1st fraction, since 7 × 40 = 280,
    18/7 = 18 × 40/7 × 40 = 720/280
  3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
    3/40 = 3 × 7/40 × 7 = 21/280
  4. Subtract the two fractions:
    720/280 - 21/280 = 720 - 21/280 = 699/280
  5. In mixed form: 2139/280

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