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Subtract 9/30 from 8/28

8/28 - 9/30 is -1/70.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 30 is 420
  2. For the 1st fraction, since 28 × 15 = 420,
    8/28 = 8 × 15/28 × 15 = 120/420
  3. Likewise, for the 2nd fraction, since 30 × 14 = 420,
    9/30 = 9 × 14/30 × 14 = 126/420
  4. Subtract the two fractions:
    120/420 - 126/420 = 120 - 126/420 = -6/420
  5. After reducing the fraction, the answer is -1/70

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