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Subtract 1/5 from 28/42

28/42 - 1/5 is 7/15.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 5 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 42 × 5 = 210,
    28/42 = 28 × 5/42 × 5 = 140/210
  3. Likewise, for the 2nd fraction, since 5 × 42 = 210,
    1/5 = 1 × 42/5 × 42 = 42/210
  4. Subtract the two like fractions:
    140/210 - 42/210 = 140 - 42/210 = 98/210
  5. After reducing the fraction, the answer is 7/15

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