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Subtract 90/70 from 20/98

1st number: 20/98, 2nd number: 1 20/70

20/98 - 90/70 is -53/49.

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,
    90/70 = 90 × 7/70 × 7 = 630/490
  4. Subtract the two fractions:
    100/490 - 630/490 = 100 - 630/490 = -530/490
  5. After reducing the fraction, the answer is -53/49

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