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Subtract 1/42 from 42/40

1st number: 1 2/40, 2nd number: 1/42

42/40 - 1/42 is 431/420.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 42 is 840
  2. For the 1st fraction, since 40 × 21 = 840,
    42/40 = 42 × 21/40 × 21 = 882/840
  3. Likewise, for the 2nd fraction, since 42 × 20 = 840,
    1/42 = 1 × 20/42 × 20 = 20/840
  4. Subtract the two fractions:
    882/840 - 20/840 = 882 - 20/840 = 862/840
  5. After reducing the fraction, the answer is 431/420
  6. In mixed form: 111/420

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