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Add 27/70 and 45/84

27/70 + 45/84 is 129/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 84 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 70 × 6 = 420,
    27/70 = 27 × 6/70 × 6 = 162/420
  3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
    45/84 = 45 × 5/84 × 5 = 225/420
  4. Add the two like fractions:
    162/420 + 225/420 = 162 + 225/420 = 387/420
  5. 387/420 simplified gives 129/140
  6. So, 27/70 + 45/84 = 129/140

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