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Add 16/40 and 15/21

16/40 + 15/21 is 39/35.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 40 and 21 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 21 × 40 = 840,
    15/21 = 15 × 40/21 × 40 = 600/840
  4. Add the two like fractions:
    336/840 + 600/840 = 336 + 600/840 = 936/840
  5. 936/840 simplified gives 39/35
  6. So, 16/40 + 15/21 = 39/35
    In mixed form: 14/35

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