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Add 56/84 and 20/70

56/84 + 20/70 is 20/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 84 and 70 is 420
  2. For the 1st fraction, since 84 × 5 = 420,
    56/84 = 56 × 5/84 × 5 = 280/420
  3. Likewise, for the 2nd fraction, since 70 × 6 = 420,
    20/70 = 20 × 6/70 × 6 = 120/420
  4. Add the two fractions:
    280/420 + 120/420 = 280 + 120/420 = 400/420
  5. After reducing the fraction, the answer is 20/21

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