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Add 1/12 and 8/21

1/12 + 8/21 is 13/28.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 21 is 84
  2. For the 1st fraction, since 12 × 7 = 84,
    1/12 = 1 × 7/12 × 7 = 7/84
  3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
    8/21 = 8 × 4/21 × 4 = 32/84
  4. Add the two fractions:
    7/84 + 32/84 = 7 + 32/84 = 39/84
  5. 39/84 simplified gives 13/28
  6. So, 1/12 + 8/21 = 13/28

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