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Add 18/80 and 21/27

18/80 + 21/27 is 361/360.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 27 is 2160

    Next, find the equivalent fraction of both fractional numbers with denominator 2160
  2. For the 1st fraction, since 80 × 27 = 2160,
    18/80 = 18 × 27/80 × 27 = 486/2160
  3. Likewise, for the 2nd fraction, since 27 × 80 = 2160,
    21/27 = 21 × 80/27 × 80 = 1680/2160
  4. Add the two like fractions:
    486/2160 + 1680/2160 = 486 + 1680/2160 = 2166/2160
  5. 2166/2160 simplified gives 361/360
  6. So, 18/80 + 21/27 = 361/360
    In mixed form: 11/360

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