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Add 25/50 and 21/80

25/50 + 21/80 is 61/80.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 400
  2. For the 1st fraction, since 50 × 8 = 400,
    25/50 = 25 × 8/50 × 8 = 200/400
  3. Likewise, for the 2nd fraction, since 80 × 5 = 400,
    21/80 = 21 × 5/80 × 5 = 105/400
  4. Add the two like fractions:
    200/400 + 105/400 = 200 + 105/400 = 305/400
  5. 305/400 simplified gives 61/80
  6. So, 25/50 + 21/80 = 61/80

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