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Subtract 30/70 from 20/98

20/98 - 30/70 is -11/49.

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,
    30/70 = 30 × 7/70 × 7 = 210/490
  4. Subtract the two fractions:
    100/490 - 210/490 = 100 - 210/490 = -110/490
  5. After reducing the fraction, the answer is -11/49

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