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Subtract 45/6 from 42/40

1st number: 1 2/40, 2nd number: 7 3/6

42/40 - 45/6 is -129/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 6 is 120

    Next, find the equivalent fraction of both fractional numbers with denominator 120
  2. For the 1st fraction, since 40 × 3 = 120,
    42/40 = 42 × 3/40 × 3 = 126/120
  3. Likewise, for the 2nd fraction, since 6 × 20 = 120,
    45/6 = 45 × 20/6 × 20 = 900/120
  4. Subtract the two like fractions:
    126/120 - 900/120 = 126 - 900/120 = -774/120
  5. After reducing the fraction, the answer is -129/20

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