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Add 20/25 and 72/80

20/25 + 72/80 is 17/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 25 and 80 is 400

    Next, find the equivalent fraction of both fractional numbers with denominator 400
  2. For the 1st fraction, since 25 × 16 = 400,
    20/25 = 20 × 16/25 × 16 = 320/400
  3. Likewise, for the 2nd fraction, since 80 × 5 = 400,
    72/80 = 72 × 5/80 × 5 = 360/400
  4. Add the two like fractions:
    320/400 + 360/400 = 320 + 360/400 = 680/400
  5. 680/400 simplified gives 17/10
  6. So, 20/25 + 72/80 = 17/10
    In mixed form: 17/10

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