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Add 4/18 and 21/42

4/18 + 21/42 is 13/18.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 42 is 126

    Next, find the equivalent fraction of both fractional numbers with denominator 126
  2. For the 1st fraction, since 18 × 7 = 126,
    4/18 = 4 × 7/18 × 7 = 28/126
  3. Likewise, for the 2nd fraction, since 42 × 3 = 126,
    21/42 = 21 × 3/42 × 3 = 63/126
  4. Add the two like fractions:
    28/126 + 63/126 = 28 + 63/126 = 91/126
  5. 91/126 simplified gives 13/18
  6. So, 4/18 + 21/42 = 13/18

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