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Subtract 1/40 from 12/30

12/30 - 1/40 is 3/8.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 40 is 120
  2. For the 1st fraction, since 30 × 4 = 120,
    12/30 = 12 × 4/30 × 4 = 48/120
  3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
    1/40 = 1 × 3/40 × 3 = 3/120
  4. Subtract the two fractions:
    48/120 - 3/120 = 48 - 3/120 = 45/120
  5. After reducing the fraction, the answer is 3/8

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