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Subtract 3/12 from 42/40

1st number: 1 2/40, 2nd number: 3/12

42/40 - 3/12 is 4/5.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 12 is 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 12 × 10 = 120,
    3/12 = 3 × 10/12 × 10 = 30/120
  4. Subtract the two fractions:
    126/120 - 30/120 = 126 - 30/120 = 96/120
  5. After reducing the fraction, the answer is 4/5

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