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Add 18/20 and 30/80

18/20 + 30/80 is 51/40.

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,
    30/80 = 30 × 1/80 × 1 = 30/80
  4. Add the two fractions:
    72/80 + 30/80 = 72 + 30/80 = 102/80
  5. After reducing the fraction, the answer is 51/40
  6. In mixed form: 111/40

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