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Subtract 1/30 from 8/42

8/42 - 1/30 is 11/70.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 30 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 42 × 5 = 210,
    8/42 = 8 × 5/42 × 5 = 40/210
  3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
    1/30 = 1 × 7/30 × 7 = 7/210
  4. Subtract the two like fractions:
    40/210 - 7/210 = 40 - 7/210 = 33/210
  5. After reducing the fraction, the answer is 11/70

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