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Add 18/20 and 90/80

1st number: 18/20, 2nd number: 1 10/80

18/20 + 90/80 is 81/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 80 is 80
  2. For the 1st fraction, since 20 × 4 = 80,
    18/20 = 18 × 4/20 × 4 = 72/80
  3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
    90/80 = 90 × 1/80 × 1 = 90/80
  4. Add the two fractions:
    72/80 + 90/80 = 72 + 90/80 = 162/80
  5. 162/80 simplified gives 81/40
  6. So, 18/20 + 90/80 = 81/40
    In mixed form: 21/40

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