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Subtract 28/10 from 30/70

1st number: 30/70, 2nd number: 2 8/10

30/70 - 28/10 is -83/35.

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,
    30/70 = 30 × 1/70 × 1 = 30/70
  3. Likewise, for the 2nd fraction, since 10 × 7 = 70,
    28/10 = 28 × 7/10 × 7 = 196/70
  4. Subtract the two fractions:
    30/70 - 196/70 = 30 - 196/70 = -166/70
  5. After reducing the fraction, the answer is -83/35

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