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Add 20/42 and 45/56

20/42 + 45/56 is 215/168.

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,
    20/42 = 20 × 4/42 × 4 = 80/168
  3. Likewise, for the 2nd fraction, since 56 × 3 = 168,
    45/56 = 45 × 3/56 × 3 = 135/168
  4. Add the two like fractions:
    80/168 + 135/168 = 80 + 135/168 = 215/168
  5. So, 20/42 + 45/56 = 215/168
    In mixed form: 147/168

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