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Subtract 30/70 from 10/28

10/28 - 30/70 is -1/14.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 70 is 140
  2. For the 1st fraction, since 28 × 5 = 140,
    10/28 = 10 × 5/28 × 5 = 50/140
  3. Likewise, for the 2nd fraction, since 70 × 2 = 140,
    30/70 = 30 × 2/70 × 2 = 60/140
  4. Subtract the two fractions:
    50/140 - 60/140 = 50 - 60/140 = -10/140
  5. After reducing the fraction, the answer is -1/14

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