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Add 21/28 and 75/80

21/28 + 75/80 is 27/16.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 28 and 80 is 560

    Next, find the equivalent fraction of both fractional numbers with denominator 560
  2. For the 1st fraction, since 28 × 20 = 560,
    21/28 = 21 × 20/28 × 20 = 420/560
  3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
    75/80 = 75 × 7/80 × 7 = 525/560
  4. Add the two like fractions:
    420/560 + 525/560 = 420 + 525/560 = 945/560
  5. 945/560 simplified gives 27/16
  6. So, 21/28 + 75/80 = 27/16
    In mixed form: 111/16

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