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Subtract 28/7 from 1/40

1st number: 1/40, 2nd number: 4 0/7

1/40 - 28/7 is -159/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 7 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 40 × 7 = 280,
    1/40 = 1 × 7/40 × 7 = 7/280
  3. Likewise, for the 2nd fraction, since 7 × 40 = 280,
    28/7 = 28 × 40/7 × 40 = 1120/280
  4. Subtract the two like fractions:
    7/280 - 1120/280 = 7 - 1120/280 = -1113/280
  5. After reducing the fraction, the answer is -159/40

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