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Add 12/72 and 42/70

12/72 + 42/70 is 23/30.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 70 is 2520

    Next, find the equivalent fraction of both fractional numbers with denominator 2520
  2. For the 1st fraction, since 72 × 35 = 2520,
    12/72 = 12 × 35/72 × 35 = 420/2520
  3. Likewise, for the 2nd fraction, since 70 × 36 = 2520,
    42/70 = 42 × 36/70 × 36 = 1512/2520
  4. Add the two like fractions:
    420/2520 + 1512/2520 = 420 + 1512/2520 = 1932/2520
  5. 1932/2520 simplified gives 23/30
  6. So, 12/72 + 42/70 = 23/30

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