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Add 28/70 and 12/45

28/70 + 12/45 is 2/3.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 45 is 630
  2. For the 1st fraction, since 70 × 9 = 630,
    28/70 = 28 × 9/70 × 9 = 252/630
  3. Likewise, for the 2nd fraction, since 45 × 14 = 630,
    12/45 = 12 × 14/45 × 14 = 168/630
  4. Add the two fractions:
    252/630 + 168/630 = 252 + 168/630 = 420/630
  5. 420/630 simplified gives 2/3
  6. So, 28/70 + 12/45 = 2/3

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