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Add 21/42 and 4/8

21/42 + 4/8 is 1/1.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 8 is 168

    Next, find the equivalent fraction of both fractional numbers with denominator 168
  2. For the 1st fraction, since 42 × 4 = 168,
    21/42 = 21 × 4/42 × 4 = 84/168
  3. Likewise, for the 2nd fraction, since 8 × 21 = 168,
    4/8 = 4 × 21/8 × 21 = 84/168
  4. Add the two like fractions:
    84/168 + 84/168 = 84 + 84/168 = 168/168
  5. 168/168 simplified gives 1/1
  6. So, 21/42 + 4/8 = 1/1

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