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Add 9/21 and 2/80

9/21 + 2/80 is 127/280.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 80 is 1680
  2. For the 1st fraction, since 21 × 80 = 1680,
    9/21 = 9 × 80/21 × 80 = 720/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    2/80 = 2 × 21/80 × 21 = 42/1680
  4. Add the two fractions:
    720/1680 + 42/1680 = 720 + 42/1680 = 762/1680
  5. After reducing the fraction, the answer is 127/280

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