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Add 8/21 and 7/8

8/21 + 7/8 is 211/168.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 8 is 168
  2. For the 1st fraction, since 21 × 8 = 168,
    8/21 = 8 × 8/21 × 8 = 64/168
  3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
    7/8 = 7 × 21/8 × 21 = 147/168
  4. Add the two fractions:
    64/168 + 147/168 = 64 + 147/168 = 211/168
  5. In mixed form: 143/168

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