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Add 12/21 and 9/25

12/21 + 9/25 is 163/175.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 525
  2. For the 1st fraction, since 21 × 25 = 525,
    12/21 = 12 × 25/21 × 25 = 300/525
  3. Likewise, for the 2nd fraction, since 25 × 21 = 525,
    9/25 = 9 × 21/25 × 21 = 189/525
  4. Add the two like fractions:
    300/525 + 189/525 = 300 + 189/525 = 489/525
  5. 489/525 simplified gives 163/175
  6. So, 12/21 + 9/25 = 163/175

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