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Add 7/12 and 21/72

7/12 + 21/72 is 7/8.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 12 and 72 is 72

    Next, find the equivalent fraction of both fractional numbers with denominator 72
  2. For the 1st fraction, since 12 × 6 = 72,
    7/12 = 7 × 6/12 × 6 = 42/72
  3. Likewise, for the 2nd fraction, since 72 × 1 = 72,
    21/72 = 21 × 1/72 × 1 = 21/72
  4. Add the two like fractions:
    42/72 + 21/72 = 42 + 21/72 = 63/72
  5. 63/72 simplified gives 7/8
  6. So, 7/12 + 21/72 = 7/8

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