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Add 72/90 and 27/42

72/90 + 27/42 is 101/70.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 630
  2. For the 1st fraction, since 90 × 7 = 630,
    72/90 = 72 × 7/90 × 7 = 504/630
  3. Likewise, for the 2nd fraction, since 42 × 15 = 630,
    27/42 = 27 × 15/42 × 15 = 405/630
  4. Add the two like fractions:
    504/630 + 405/630 = 504 + 405/630 = 909/630
  5. 909/630 simplified gives 101/70
  6. So, 72/90 + 27/42 = 101/70
    In mixed form: 131/70

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