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Add 21/56 and 20/80

21/56 + 20/80 is 5/8.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 56 and 80 is 560

    Next, find the equivalent fraction of both fractional numbers with denominator 560
  2. For the 1st fraction, since 56 × 10 = 560,
    21/56 = 21 × 10/56 × 10 = 210/560
  3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
    20/80 = 20 × 7/80 × 7 = 140/560
  4. Add the two like fractions:
    210/560 + 140/560 = 210 + 140/560 = 350/560
  5. 350/560 simplified gives 5/8
  6. So, 21/56 + 20/80 = 5/8

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