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Add 30/54 and 21/70

30/54 + 21/70 is 77/90.

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,
    30/54 = 30 × 35/54 × 35 = 1050/1890
  3. Likewise, for the 2nd fraction, since 70 × 27 = 1890,
    21/70 = 21 × 27/70 × 27 = 567/1890
  4. Add the two fractions:
    1050/1890 + 567/1890 = 1050 + 567/1890 = 1617/1890
  5. After reducing the fraction, the answer is 77/90

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