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Add 30/80 and 9/40

30/80 + 9/40 is 3/5.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 40 is 80

    Next, find the equivalent fraction of both fractional numbers with denominator 80
  2. For the 1st fraction, since 80 × 1 = 80,
    30/80 = 30 × 1/80 × 1 = 30/80
  3. Likewise, for the 2nd fraction, since 40 × 2 = 80,
    9/40 = 9 × 2/40 × 2 = 18/80
  4. Add the two like fractions:
    30/80 + 18/80 = 30 + 18/80 = 48/80
  5. 48/80 simplified gives 3/5
  6. So, 30/80 + 9/40 = 3/5

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