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Add 54/90 and 75/80

54/90 + 75/80 is 123/80.

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,
    54/90 = 54 × 8/90 × 8 = 432/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    75/80 = 75 × 9/80 × 9 = 675/720
  4. Add the two like fractions:
    432/720 + 675/720 = 432 + 675/720 = 1107/720
  5. 1107/720 simplified gives 123/80
  6. So, 54/90 + 75/80 = 123/80
    In mixed form: 143/80

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