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Add 20/80 and 45/9

1st number: 20/80, 2nd number: 5 0/9

20/80 + 45/9 is 21/4.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 9 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 80 × 9 = 720,
    20/80 = 20 × 9/80 × 9 = 180/720
  3. Likewise, for the 2nd fraction, since 9 × 80 = 720,
    45/9 = 45 × 80/9 × 80 = 3600/720
  4. Add the two like fractions:
    180/720 + 3600/720 = 180 + 3600/720 = 3780/720
  5. 3780/720 simplified gives 21/4
  6. So, 20/80 + 45/9 = 21/4
    In mixed form: 51/4

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