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Subtract 10/45 from 21/49

21/49 - 10/45 is 13/63.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 49 and 45 is 2205

    Next, find the equivalent fraction of both fractional numbers with denominator 2205
  2. For the 1st fraction, since 49 × 45 = 2205,
    21/49 = 21 × 45/49 × 45 = 945/2205
  3. Likewise, for the 2nd fraction, since 45 × 49 = 2205,
    10/45 = 10 × 49/45 × 49 = 490/2205
  4. Subtract the two like fractions:
    945/2205 - 490/2205 = 945 - 490/2205 = 455/2205
  5. After reducing the fraction, the answer is 13/63

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