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Add 28/70 and 40/80

28/70 + 40/80 is 9/10.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 80 is 560

    Next, find the equivalent fraction of both fractional numbers with denominator 560
  2. For the 1st fraction, since 70 × 8 = 560,
    28/70 = 28 × 8/70 × 8 = 224/560
  3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
    40/80 = 40 × 7/80 × 7 = 280/560
  4. Add the two like fractions:
    224/560 + 280/560 = 224 + 280/560 = 504/560
  5. 504/560 simplified gives 9/10
  6. So, 28/70 + 40/80 = 9/10

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