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Add 21/80 and 15/50

21/80 + 15/50 is 9/16.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 50 is 400

    Next, find the equivalent fraction of both fractional numbers with denominator 400
  2. For the 1st fraction, since 80 × 5 = 400,
    21/80 = 21 × 5/80 × 5 = 105/400
  3. Likewise, for the 2nd fraction, since 50 × 8 = 400,
    15/50 = 15 × 8/50 × 8 = 120/400
  4. Add the two like fractions:
    105/400 + 120/400 = 105 + 120/400 = 225/400
  5. 225/400 simplified gives 9/16
  6. So, 21/80 + 15/50 = 9/16

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