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Subtract 12/70 from 3/45

3/45 - 12/70 is -11/105.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 70 is 630
  2. For the 1st fraction, since 45 × 14 = 630,
    3/45 = 3 × 14/45 × 14 = 42/630
  3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
    12/70 = 12 × 9/70 × 9 = 108/630
  4. Subtract the two fractions:
    42/630 - 108/630 = 42 - 108/630 = -66/630
  5. After reducing the fraction, the answer is -11/105

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