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Subtract 18/4 from 42/2

1st number: 21 0/2, 2nd number: 4 2/4

42/2 - 18/4 is 33/2.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 2 and 4 is 4

    Next, find the equivalent fraction of both fractional numbers with denominator 4
  2. For the 1st fraction, since 2 × 2 = 4,
    42/2 = 42 × 2/2 × 2 = 84/4
  3. Likewise, for the 2nd fraction, since 4 × 1 = 4,
    18/4 = 18 × 1/4 × 1 = 18/4
  4. Subtract the two like fractions:
    84/4 - 18/4 = 84 - 18/4 = 66/4
  5. After reducing the fraction, the answer is 33/2
  6. In mixed form: 161/2

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