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Add 18/28 and 72/80

18/28 + 72/80 is 54/35.

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,
    18/28 = 18 × 20/28 × 20 = 360/560
  3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
    72/80 = 72 × 7/80 × 7 = 504/560
  4. Add the two like fractions:
    360/560 + 504/560 = 360 + 504/560 = 864/560
  5. 864/560 simplified gives 54/35
  6. So, 18/28 + 72/80 = 54/35
    In mixed form: 119/35

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