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Subtract 21/25 from 3/15

3/15 - 21/25 is -16/25.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 25 is 75

    Next, find the equivalent fraction of both fractional numbers with denominator 75
  2. For the 1st fraction, since 15 × 5 = 75,
    3/15 = 3 × 5/15 × 5 = 15/75
  3. Likewise, for the 2nd fraction, since 25 × 3 = 75,
    21/25 = 21 × 3/25 × 3 = 63/75
  4. Subtract the two like fractions:
    15/75 - 63/75 = 15 - 63/75 = -48/75
  5. After reducing the fraction, the answer is -16/25

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