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Subtract 90/10 from 20/70

1st number: 20/70, 2nd number: 9 0/10

20/70 - 90/10 is -61/7.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 10 is 70
  2. For the 1st fraction, since 70 × 1 = 70,
    20/70 = 20 × 1/70 × 1 = 20/70
  3. Likewise, for the 2nd fraction, since 10 × 7 = 70,
    90/10 = 90 × 7/10 × 7 = 630/70
  4. Subtract the two fractions:
    20/70 - 630/70 = 20 - 630/70 = -610/70
  5. After reducing the fraction, the answer is -61/7

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