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Add 27/42 and 54/90

27/42 + 54/90 is 87/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 90 is 630

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 42 × 15 = 630,
    27/42 = 27 × 15/42 × 15 = 405/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    54/90 = 54 × 7/90 × 7 = 378/630
  4. Add the two like fractions:
    405/630 + 378/630 = 405 + 378/630 = 783/630
  5. 783/630 simplified gives 87/70
  6. So, 27/42 + 54/90 = 87/70
    In mixed form: 117/70

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