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Add 30/70 and 30/80

30/70 + 30/80 is 45/56.

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,
    30/70 = 30 × 8/70 × 8 = 240/560
  3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
    30/80 = 30 × 7/80 × 7 = 210/560
  4. Add the two like fractions:
    240/560 + 210/560 = 240 + 210/560 = 450/560
  5. 450/560 simplified gives 45/56
  6. So, 30/70 + 30/80 = 45/56

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