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Add 16/21 and 35/40

16/21 + 35/40 is 275/168.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 40 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 21 × 40 = 840,
    16/21 = 16 × 40/21 × 40 = 640/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    35/40 = 35 × 21/40 × 21 = 735/840
  4. Add the two like fractions:
    640/840 + 735/840 = 640 + 735/840 = 1375/840
  5. 1375/840 simplified gives 275/168
  6. So, 16/21 + 35/40 = 275/168
    In mixed form: 1107/168

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