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Add 15/80 and 8/90

15/80 + 8/90 is 199/720.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 90 is 720
  2. For the 1st fraction, since 80 × 9 = 720,
    15/80 = 15 × 9/80 × 9 = 135/720
  3. Likewise, for the 2nd fraction, since 90 × 8 = 720,
    8/90 = 8 × 8/90 × 8 = 64/720
  4. Add the two fractions:
    135/720 + 64/720 = 135 + 64/720 = 199/720

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