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Add 18/42 and 21/56

18/42 + 21/56 is 45/56.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 56 is 168

    Next, find the equivalent fraction of both fractional numbers with denominator 168
  2. For the 1st fraction, since 42 × 4 = 168,
    18/42 = 18 × 4/42 × 4 = 72/168
  3. Likewise, for the 2nd fraction, since 56 × 3 = 168,
    21/56 = 21 × 3/56 × 3 = 63/168
  4. Add the two like fractions:
    72/168 + 63/168 = 72 + 63/168 = 135/168
  5. 135/168 simplified gives 45/56
  6. So, 18/42 + 21/56 = 45/56

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