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Add 21/42 and 50/72

21/42 + 50/72 is 43/36.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 72 is 504

    Next, find the equivalent fraction of both fractional numbers with denominator 504
  2. For the 1st fraction, since 42 × 12 = 504,
    21/42 = 21 × 12/42 × 12 = 252/504
  3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
    50/72 = 50 × 7/72 × 7 = 350/504
  4. Add the two like fractions:
    252/504 + 350/504 = 252 + 350/504 = 602/504
  5. 602/504 simplified gives 43/36
  6. So, 21/42 + 50/72 = 43/36
    In mixed form: 17/36

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