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Add 15/21 and 2/7

15/21 + 2/7 is 1/1.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 7 is 21

    Next, find the equivalent fraction of both fractional numbers with denominator 21
  2. For the 1st fraction, since 21 × 1 = 21,
    15/21 = 15 × 1/21 × 1 = 15/21
  3. Likewise, for the 2nd fraction, since 7 × 3 = 21,
    2/7 = 2 × 3/7 × 3 = 6/21
  4. Add the two like fractions:
    15/21 + 6/21 = 15 + 6/21 = 21/21
  5. 21/21 simplified gives 1/1
  6. So, 15/21 + 2/7 = 1/1

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