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Add 4/80 and 3/90

4/80 + 3/90 is 1/12.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 80 × 9 = 720,
    4/80 = 4 × 9/80 × 9 = 36/720
  3. Likewise, for the 2nd fraction, since 90 × 8 = 720,
    3/90 = 3 × 8/90 × 8 = 24/720
  4. Add the two like fractions:
    36/720 + 24/720 = 36 + 24/720 = 60/720
  5. 60/720 simplified gives 1/12
  6. So, 4/80 + 3/90 = 1/12

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