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Add 30/70 and 20/42

30/70 + 20/42 is 19/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 42 is 210
  2. For the 1st fraction, since 70 × 3 = 210,
    30/70 = 30 × 3/70 × 3 = 90/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    20/42 = 20 × 5/42 × 5 = 100/210
  4. Add the two fractions:
    90/210 + 100/210 = 90 + 100/210 = 190/210
  5. After reducing the fraction, the answer is 19/21

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