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Subtract 15/70 from 20/98

20/98 - 15/70 is -1/98.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 98 and 70 is 490
  2. For the 1st fraction, since 98 × 5 = 490,
    20/98 = 20 × 5/98 × 5 = 100/490
  3. Likewise, for the 2nd fraction, since 70 × 7 = 490,
    15/70 = 15 × 7/70 × 7 = 105/490
  4. Subtract the two fractions:
    100/490 - 105/490 = 100 - 105/490 = -5/490
  5. After reducing the fraction, the answer is -1/98

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