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Add 20/35 and 21/54

20/35 + 21/54 is 121/126.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 35 and 54 is 1890
  2. For the 1st fraction, since 35 × 54 = 1890,
    20/35 = 20 × 54/35 × 54 = 1080/1890
  3. Likewise, for the 2nd fraction, since 54 × 35 = 1890,
    21/54 = 21 × 35/54 × 35 = 735/1890
  4. Add the two fractions:
    1080/1890 + 735/1890 = 1080 + 735/1890 = 1815/1890
  5. After reducing the fraction, the answer is 121/126

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