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Add 3/80 and 21/45

3/80 + 21/45 is 121/240.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 45 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 80 × 9 = 720,
    3/80 = 3 × 9/80 × 9 = 27/720
  3. Likewise, for the 2nd fraction, since 45 × 16 = 720,
    21/45 = 21 × 16/45 × 16 = 336/720
  4. Add the two like fractions:
    27/720 + 336/720 = 27 + 336/720 = 363/720
  5. 363/720 simplified gives 121/240
  6. So, 3/80 + 21/45 = 121/240

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