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Add 21/54 and 35/70

21/54 + 35/70 is 8/9.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 54 and 70 is 1890
  2. For the 1st fraction, since 54 × 35 = 1890,
    21/54 = 21 × 35/54 × 35 = 735/1890
  3. Likewise, for the 2nd fraction, since 70 × 27 = 1890,
    35/70 = 35 × 27/70 × 27 = 945/1890
  4. Add the two fractions:
    735/1890 + 945/1890 = 735 + 945/1890 = 1680/1890
  5. After reducing the fraction, the answer is 8/9

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