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Add 21/42 and 15/50

21/42 + 15/50 is 4/5.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 50 is 1050

    Next, find the equivalent fraction of both fractional numbers with denominator 1050
  2. For the 1st fraction, since 42 × 25 = 1050,
    21/42 = 21 × 25/42 × 25 = 525/1050
  3. Likewise, for the 2nd fraction, since 50 × 21 = 1050,
    15/50 = 15 × 21/50 × 21 = 315/1050
  4. Add the two like fractions:
    525/1050 + 315/1050 = 525 + 315/1050 = 840/1050
  5. 840/1050 simplified gives 4/5
  6. So, 21/42 + 15/50 = 4/5

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