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Add 4/80 and 90/81

1st number: 4/80, 2nd number: 1 9/81

4/80 + 90/81 is 209/180.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 81 is 6480

    Next, find the equivalent fraction of both fractional numbers with denominator 6480
  2. For the 1st fraction, since 80 × 81 = 6480,
    4/80 = 4 × 81/80 × 81 = 324/6480
  3. Likewise, for the 2nd fraction, since 81 × 80 = 6480,
    90/81 = 90 × 80/81 × 80 = 7200/6480
  4. Add the two like fractions:
    324/6480 + 7200/6480 = 324 + 7200/6480 = 7524/6480
  5. 7524/6480 simplified gives 209/180
  6. So, 4/80 + 90/81 = 209/180
    In mixed form: 129/180

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