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Subtract 9/40 from 8/7

1st number: 1 1/7, 2nd number: 9/40

8/7 - 9/40 is 257/280.

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,
    8/7 = 8 × 40/7 × 40 = 320/280
  3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
    9/40 = 9 × 7/40 × 7 = 63/280
  4. Subtract the two fractions:
    320/280 - 63/280 = 320 - 63/280 = 257/280

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