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Add 30/70 and 21/56

30/70 + 21/56 is 45/56.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 56 is 280

    Next, find the equivalent fraction of both fractional numbers with denominator 280
  2. For the 1st fraction, since 70 × 4 = 280,
    30/70 = 30 × 4/70 × 4 = 120/280
  3. Likewise, for the 2nd fraction, since 56 × 5 = 280,
    21/56 = 21 × 5/56 × 5 = 105/280
  4. Add the two like fractions:
    120/280 + 105/280 = 120 + 105/280 = 225/280
  5. 225/280 simplified gives 45/56
  6. So, 30/70 + 21/56 = 45/56

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