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Add 21/45 and 8/80

21/45 + 8/80 is 17/30.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 45 × 16 = 720,
    21/45 = 21 × 16/45 × 16 = 336/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    8/80 = 8 × 9/80 × 9 = 72/720
  4. Add the two like fractions:
    336/720 + 72/720 = 336 + 72/720 = 408/720
  5. 408/720 simplified gives 17/30
  6. So, 21/45 + 8/80 = 17/30

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