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Add 21/80 and 21/45

21/80 + 21/45 is 35/48.

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,
    21/80 = 21 × 9/80 × 9 = 189/720
  3. Likewise, for the 2nd fraction, since 45 × 16 = 720,
    21/45 = 21 × 16/45 × 16 = 336/720
  4. Add the two like fractions:
    189/720 + 336/720 = 189 + 336/720 = 525/720
  5. 525/720 simplified gives 35/48
  6. So, 21/80 + 21/45 = 35/48

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