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Add 6/42 and 21/40

6/42 + 21/40 is 187/280.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 40 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 42 × 20 = 840,
    6/42 = 6 × 20/42 × 20 = 120/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    21/40 = 21 × 21/40 × 21 = 441/840
  4. Add the two like fractions:
    120/840 + 441/840 = 120 + 441/840 = 561/840
  5. 561/840 simplified gives 187/280
  6. So, 6/42 + 21/40 = 187/280

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