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Subtract 15/40 from 20/98

20/98 - 15/40 is -67/392.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 98 and 40 is 1960

    Next, find the equivalent fraction of both fractional numbers with denominator 1960
  2. For the 1st fraction, since 98 × 20 = 1960,
    20/98 = 20 × 20/98 × 20 = 400/1960
  3. Likewise, for the 2nd fraction, since 40 × 49 = 1960,
    15/40 = 15 × 49/40 × 49 = 735/1960
  4. Subtract the two like fractions:
    400/1960 - 735/1960 = 400 - 735/1960 = -335/1960
  5. After reducing the fraction, the answer is -67/392

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