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Add 80/90 and 81/72

1st number: 80/90, 2nd number: 1 9/72

80/90 + 81/72 is 145/72.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 72 is 360
  2. For the 1st fraction, since 90 × 4 = 360,
    80/90 = 80 × 4/90 × 4 = 320/360
  3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
    81/72 = 81 × 5/72 × 5 = 405/360
  4. Add the two fractions:
    320/360 + 405/360 = 320 + 405/360 = 725/360
  5. 725/360 simplified gives 145/72
  6. So, 80/90 + 81/72 = 145/72
    In mixed form: 21/72

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