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Add 21/80 and 6/21

21/80 + 6/21 is 307/560.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 21 is 1680

    Next, find the equivalent fraction of both fractional numbers with denominator 1680
  2. For the 1st fraction, since 80 × 21 = 1680,
    21/80 = 21 × 21/80 × 21 = 441/1680
  3. Likewise, for the 2nd fraction, since 21 × 80 = 1680,
    6/21 = 6 × 80/21 × 80 = 480/1680
  4. Add the two like fractions:
    441/1680 + 480/1680 = 441 + 480/1680 = 921/1680
  5. 921/1680 simplified gives 307/560
  6. So, 21/80 + 6/21 = 307/560

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