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Subtract 7/81 from 42/4

1st number: 10 2/4, 2nd number: 7/81

42/4 - 7/81 is 1687/162.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 81 is 324

    Next, find the equivalent fraction of both fractional numbers with denominator 324
  2. For the 1st fraction, since 4 × 81 = 324,
    42/4 = 42 × 81/4 × 81 = 3402/324
  3. Likewise, for the 2nd fraction, since 81 × 4 = 324,
    7/81 = 7 × 4/81 × 4 = 28/324
  4. Subtract the two like fractions:
    3402/324 - 28/324 = 3402 - 28/324 = 3374/324
  5. After reducing the fraction, the answer is 1687/162
  6. In mixed form: 1067/162

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