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Add 18/21 and 5/8

18/21 + 5/8 is 83/56.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 8 is 168

    Next, find the equivalent fraction of both fractional numbers with denominator 168
  2. For the 1st fraction, since 21 × 8 = 168,
    18/21 = 18 × 8/21 × 8 = 144/168
  3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
    5/8 = 5 × 21/8 × 21 = 105/168
  4. Add the two like fractions:
    144/168 + 105/168 = 144 + 105/168 = 249/168
  5. 249/168 simplified gives 83/56
  6. So, 18/21 + 5/8 = 83/56
    In mixed form: 127/56

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