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Add 16/21 and 42/80

16/21 + 42/80 is 1081/840.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 1680
  2. For the 1st fraction, since 21 × 80 = 1680,
    16/21 = 16 × 80/21 × 80 = 1280/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    42/80 = 42 × 21/80 × 21 = 882/1680
  4. Add the two like fractions:
    1280/1680 + 882/1680 = 1280 + 882/1680 = 2162/1680
  5. 2162/1680 simplified gives 1081/840
  6. So, 16/21 + 42/80 = 1081/840
    In mixed form: 1241/840

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