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Subtract 20/42 from 5/9

5/9 - 20/42 is 5/63.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 9 and 42 is 126
  2. For the 1st fraction, since 9 × 14 = 126,
    5/9 = 5 × 14/9 × 14 = 70/126
  3. Likewise, for the 2nd fraction, since 42 × 3 = 126,
    20/42 = 20 × 3/42 × 3 = 60/126
  4. Subtract the two fractions:
    70/126 - 60/126 = 70 - 60/126 = 10/126
  5. After reducing the fraction, the answer is 5/63

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