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Add 8/21 and 1/15

8/21 + 1/15 is 47/105.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 15 is 105
  2. For the 1st fraction, since 21 × 5 = 105,
    8/21 = 8 × 5/21 × 5 = 40/105
  3. Likewise, for the 2nd fraction, since 15 × 7 = 105,
    1/15 = 1 × 7/15 × 7 = 7/105
  4. Add the two fractions:
    40/105 + 7/105 = 40 + 7/105 = 47/105

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