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Add 21/18 and 60/80

1st number: 1 3/18, 2nd number: 60/80

21/18 + 60/80 is 23/12.

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,
    21/18 = 21 × 40/18 × 40 = 840/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    60/80 = 60 × 9/80 × 9 = 540/720
  4. Add the two like fractions:
    840/720 + 540/720 = 840 + 540/720 = 1380/720
  5. 1380/720 simplified gives 23/12
  6. So, 21/18 + 60/80 = 23/12
    In mixed form: 111/12

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