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Subtract 4/42 from 5/15

5/15 - 4/42 is 5/21.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 42 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 15 × 14 = 210,
    5/15 = 5 × 14/15 × 14 = 70/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    4/42 = 4 × 5/42 × 5 = 20/210
  4. Subtract the two like fractions:
    70/210 - 20/210 = 70 - 20/210 = 50/210
  5. After reducing the fraction, the answer is 5/21

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