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Subtract 10/63 from 21/49

21/49 - 10/63 is 17/63.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 49 and 63 is 441
  2. For the 1st fraction, since 49 × 9 = 441,
    21/49 = 21 × 9/49 × 9 = 189/441
  3. Likewise, for the 2nd fraction, since 63 × 7 = 441,
    10/63 = 10 × 7/63 × 7 = 70/441
  4. Subtract the two fractions:
    189/441 - 70/441 = 189 - 70/441 = 119/441
  5. After reducing the fraction, the answer is 17/63

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