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Add 30/80 and 56/70

30/80 + 56/70 is 47/40.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 560
  2. For the 1st fraction, since 80 × 7 = 560,
    30/80 = 30 × 7/80 × 7 = 210/560
  3. Likewise, for the 2nd fraction, since 70 × 8 = 560,
    56/70 = 56 × 8/70 × 8 = 448/560
  4. Add the two like fractions:
    210/560 + 448/560 = 210 + 448/560 = 658/560
  5. 658/560 simplified gives 47/40
  6. So, 30/80 + 56/70 = 47/40
    In mixed form: 17/40

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