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Add 30/81 and 45/70

30/81 + 45/70 is 383/378.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 81 and 70 is 5670
  2. For the 1st fraction, since 81 × 70 = 5670,
    30/81 = 30 × 70/81 × 70 = 2100/5670
  3. Likewise, for the 2nd fraction, since 70 × 81 = 5670,
    45/70 = 45 × 81/70 × 81 = 3645/5670
  4. Add the two fractions:
    2100/5670 + 3645/5670 = 2100 + 3645/5670 = 5745/5670
  5. 5745/5670 simplified gives 383/378
  6. So, 30/81 + 45/70 = 383/378
    In mixed form: 15/378

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