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Add 30/18 and 21/80

1st number: 1 12/18, 2nd number: 21/80

30/18 + 21/80 is 463/240.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 80 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 18 × 40 = 720,
    30/18 = 30 × 40/18 × 40 = 1200/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    21/80 = 21 × 9/80 × 9 = 189/720
  4. Add the two like fractions:
    1200/720 + 189/720 = 1200 + 189/720 = 1389/720
  5. 1389/720 simplified gives 463/240
  6. So, 30/18 + 21/80 = 463/240
    In mixed form: 1223/240

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