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Add 21/27 and 4/8

21/27 + 4/8 is 23/18.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 27 and 8 is 216

    Next, find the equivalent fraction of both fractional numbers with denominator 216
  2. For the 1st fraction, since 27 × 8 = 216,
    21/27 = 21 × 8/27 × 8 = 168/216
  3. Likewise, for the 2nd fraction, since 8 × 27 = 216,
    4/8 = 4 × 27/8 × 27 = 108/216
  4. Add the two like fractions:
    168/216 + 108/216 = 168 + 108/216 = 276/216
  5. 276/216 simplified gives 23/18
  6. So, 21/27 + 4/8 = 23/18
    In mixed form: 15/18

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