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Subtract 28/30 from 15/70

15/70 - 28/30 is -151/210.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 30 is 210
  2. For the 1st fraction, since 70 × 3 = 210,
    15/70 = 15 × 3/70 × 3 = 45/210
  3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
    28/30 = 28 × 7/30 × 7 = 196/210
  4. Subtract the two fractions:
    45/210 - 196/210 = 45 - 196/210 = -151/210

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