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Add 12/72 and 21/36

12/72 + 21/36 is 3/4.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 36 is 72

    Next, find the equivalent fraction of both fractional numbers with denominator 72
  2. For the 1st fraction, since 72 × 1 = 72,
    12/72 = 12 × 1/72 × 1 = 12/72
  3. Likewise, for the 2nd fraction, since 36 × 2 = 72,
    21/36 = 21 × 2/36 × 2 = 42/72
  4. Add the two like fractions:
    12/72 + 42/72 = 12 + 42/72 = 54/72
  5. 54/72 simplified gives 3/4
  6. So, 12/72 + 21/36 = 3/4

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