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Subtract 15/45 from 15/42

15/42 - 15/45 is 1/42.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 45 is 630
  2. For the 1st fraction, since 42 × 15 = 630,
    15/42 = 15 × 15/42 × 15 = 225/630
  3. Likewise, for the 2nd fraction, since 45 × 14 = 630,
    15/45 = 15 × 14/45 × 14 = 210/630
  4. Subtract the two fractions:
    225/630 - 210/630 = 225 - 210/630 = 15/630
  5. After reducing the fraction, the answer is 1/42

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