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Subtract 1/20 from 42/30

1st number: 1 12/30, 2nd number: 1/20

42/30 - 1/20 is 27/20.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 20 is 60

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 30 × 2 = 60,
    42/30 = 42 × 2/30 × 2 = 84/60
  3. Likewise, for the 2nd fraction, since 20 × 3 = 60,
    1/20 = 1 × 3/20 × 3 = 3/60
  4. Subtract the two like fractions:
    84/60 - 3/60 = 84 - 3/60 = 81/60
  5. After reducing the fraction, the answer is 27/20
  6. In mixed form: 17/20

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