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Add 18/21 and 4/80

18/21 + 4/80 is 127/140.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 80 is 1680

    Next, find the equivalent fraction of both fractional numbers with denominator 1680
  2. For the 1st fraction, since 21 × 80 = 1680,
    18/21 = 18 × 80/21 × 80 = 1440/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    4/80 = 4 × 21/80 × 21 = 84/1680
  4. Add the two like fractions:
    1440/1680 + 84/1680 = 1440 + 84/1680 = 1524/1680
  5. 1524/1680 simplified gives 127/140
  6. So, 18/21 + 4/80 = 127/140

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