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Subtract 15/30 from 10/70

10/70 - 15/30 is -5/14.

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,
    10/70 = 10 × 3/70 × 3 = 30/210
  3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
    15/30 = 15 × 7/30 × 7 = 105/210
  4. Subtract the two fractions:
    30/210 - 105/210 = 30 - 105/210 = -75/210
  5. After reducing the fraction, the answer is -5/14

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