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Subtract 1/30 from 42/84

42/84 - 1/30 is 7/15.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 30 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 84 × 5 = 420,
    42/84 = 42 × 5/84 × 5 = 210/420
  3. Likewise, for the 2nd fraction, since 30 × 14 = 420,
    1/30 = 1 × 14/30 × 14 = 14/420
  4. Subtract the two like fractions:
    210/420 - 14/420 = 210 - 14/420 = 196/420
  5. After reducing the fraction, the answer is 7/15

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