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Add 42/84 and 27/90

42/84 + 27/90 is 4/5.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 90 is 1260

    Next, find the equivalent fraction of both fractional numbers with denominator 1260
  2. For the 1st fraction, since 84 × 15 = 1260,
    42/84 = 42 × 15/84 × 15 = 630/1260
  3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
    27/90 = 27 × 14/90 × 14 = 378/1260
  4. Add the two like fractions:
    630/1260 + 378/1260 = 630 + 378/1260 = 1008/1260
  5. 1008/1260 simplified gives 4/5
  6. So, 42/84 + 27/90 = 4/5

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