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Add 81/60 and 70/80

1st number: 1 21/60, 2nd number: 70/80

81/60 + 70/80 is 89/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 60 and 80 is 240

    Next, find the equivalent fraction of both fractional numbers with denominator 240
  2. For the 1st fraction, since 60 × 4 = 240,
    81/60 = 81 × 4/60 × 4 = 324/240
  3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
    70/80 = 70 × 3/80 × 3 = 210/240
  4. Add the two like fractions:
    324/240 + 210/240 = 324 + 210/240 = 534/240
  5. 534/240 simplified gives 89/40
  6. So, 81/60 + 70/80 = 89/40
    In mixed form: 29/40

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