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Add 12/70 and 4/90

12/70 + 4/90 is 68/315.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 90 is 630
  2. For the 1st fraction, since 70 × 9 = 630,
    12/70 = 12 × 9/70 × 9 = 108/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    4/90 = 4 × 7/90 × 7 = 28/630
  4. Add the two fractions:
    108/630 + 28/630 = 108 + 28/630 = 136/630
  5. After reducing the fraction, the answer is 68/315

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