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Subtract 4/49 from 18/20

18/20 - 4/49 is 401/490.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 49 is 980

    Next, find the equivalent fraction of both fractional numbers with denominator 980
  2. For the 1st fraction, since 20 × 49 = 980,
    18/20 = 18 × 49/20 × 49 = 882/980
  3. Likewise, for the 2nd fraction, since 49 × 20 = 980,
    4/49 = 4 × 20/49 × 20 = 80/980
  4. Subtract the two like fractions:
    882/980 - 80/980 = 882 - 80/980 = 802/980
  5. After reducing the fraction, the answer is 401/490

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