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Add 2/21 and 15/42

2/21 + 15/42 is 19/42.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 42 is 42

    Next, find the equivalent fraction of both fractional numbers with denominator 42
  2. For the 1st fraction, since 21 × 2 = 42,
    2/21 = 2 × 2/21 × 2 = 4/42
  3. Likewise, for the 2nd fraction, since 42 × 1 = 42,
    15/42 = 15 × 1/42 × 1 = 15/42
  4. Add the two like fractions:
    4/42 + 15/42 = 4 + 15/42 = 19/42
  5. So, 2/21 + 15/42 = 19/42

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