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Add 21/25 and 12/81

21/25 + 12/81 is 667/675.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 25 and 81 is 2025

    Next, find the equivalent fraction of both fractional numbers with denominator 2025
  2. For the 1st fraction, since 25 × 81 = 2025,
    21/25 = 21 × 81/25 × 81 = 1701/2025
  3. Likewise, for the 2nd fraction, since 81 × 25 = 2025,
    12/81 = 12 × 25/81 × 25 = 300/2025
  4. Add the two like fractions:
    1701/2025 + 300/2025 = 1701 + 300/2025 = 2001/2025
  5. 2001/2025 simplified gives 667/675
  6. So, 21/25 + 12/81 = 667/675

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