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Subtract 15/20 from 20/49

20/49 - 15/20 is -67/196.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 49 and 20 is 980
  2. For the 1st fraction, since 49 × 20 = 980,
    20/49 = 20 × 20/49 × 20 = 400/980
  3. Likewise, for the 2nd fraction, since 20 × 49 = 980,
    15/20 = 15 × 49/20 × 49 = 735/980
  4. Subtract the two fractions:
    400/980 - 735/980 = 400 - 735/980 = -335/980
  5. After reducing the fraction, the answer is -67/196

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