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Subtract 4/40 from 63/42

1st number: 1 21/42, 2nd number: 4/40

63/42 - 4/40 is 7/5.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 40 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 42 × 20 = 840,
    63/42 = 63 × 20/42 × 20 = 1260/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    4/40 = 4 × 21/40 × 21 = 84/840
  4. Subtract the two like fractions:
    1260/840 - 84/840 = 1260 - 84/840 = 1176/840
  5. After reducing the fraction, the answer is 7/5
  6. In mixed form: 12/5

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