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Add 21/28 and 2/80

21/28 + 2/80 is 31/40.

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,
    2/80 = 2 × 7/80 × 7 = 14/560
  4. Add the two like fractions:
    420/560 + 14/560 = 420 + 14/560 = 434/560
  5. 434/560 simplified gives 31/40
  6. So, 21/28 + 2/80 = 31/40

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