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Add 27/90 and 70/80

27/90 + 70/80 is 47/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 80 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 90 × 8 = 720,
    27/90 = 27 × 8/90 × 8 = 216/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    70/80 = 70 × 9/80 × 9 = 630/720
  4. Add the two like fractions:
    216/720 + 630/720 = 216 + 630/720 = 846/720
  5. 846/720 simplified gives 47/40
  6. So, 27/90 + 70/80 = 47/40
    In mixed form: 17/40

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