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Add 21/70 and 18/27

21/70 + 18/27 is 29/30.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 27 is 1890

    Next, find the equivalent fraction of both fractional numbers with denominator 1890
  2. For the 1st fraction, since 70 × 27 = 1890,
    21/70 = 21 × 27/70 × 27 = 567/1890
  3. Likewise, for the 2nd fraction, since 27 × 70 = 1890,
    18/27 = 18 × 70/27 × 70 = 1260/1890
  4. Add the two like fractions:
    567/1890 + 1260/1890 = 567 + 1260/1890 = 1827/1890
  5. 1827/1890 simplified gives 29/30
  6. So, 21/70 + 18/27 = 29/30

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