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Add 21/25 and 12/21

21/25 + 12/21 is 247/175.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 25 and 21 is 525

    Next, find the equivalent fraction of both fractional numbers with denominator 525
  2. For the 1st fraction, since 25 × 21 = 525,
    21/25 = 21 × 21/25 × 21 = 441/525
  3. Likewise, for the 2nd fraction, since 21 × 25 = 525,
    12/21 = 12 × 25/21 × 25 = 300/525
  4. Add the two like fractions:
    441/525 + 300/525 = 441 + 300/525 = 741/525
  5. 741/525 simplified gives 247/175
  6. So, 21/25 + 12/21 = 247/175
    In mixed form: 172/175

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