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Add 21/35 and 9/80

21/35 + 9/80 is 57/80.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 35 and 80 is 560

    Next, find the equivalent fraction of both fractional numbers with denominator 560
  2. For the 1st fraction, since 35 × 16 = 560,
    21/35 = 21 × 16/35 × 16 = 336/560
  3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
    9/80 = 9 × 7/80 × 7 = 63/560
  4. Add the two like fractions:
    336/560 + 63/560 = 336 + 63/560 = 399/560
  5. 399/560 simplified gives 57/80
  6. So, 21/35 + 9/80 = 57/80

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