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Add 16/40 and 42/84

16/40 + 42/84 is 9/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 84 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 40 × 21 = 840,
    16/40 = 16 × 21/40 × 21 = 336/840
  3. Likewise, for the 2nd fraction, since 84 × 10 = 840,
    42/84 = 42 × 10/84 × 10 = 420/840
  4. Add the two like fractions:
    336/840 + 420/840 = 336 + 420/840 = 756/840
  5. 756/840 simplified gives 9/10
  6. So, 16/40 + 42/84 = 9/10

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