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Add 7/72 and 21/63

7/72 + 21/63 is 31/72.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 63 is 504

    Next, find the equivalent fraction of both fractional numbers with denominator 504
  2. For the 1st fraction, since 72 × 7 = 504,
    7/72 = 7 × 7/72 × 7 = 49/504
  3. Likewise, for the 2nd fraction, since 63 × 8 = 504,
    21/63 = 21 × 8/63 × 8 = 168/504
  4. Add the two like fractions:
    49/504 + 168/504 = 49 + 168/504 = 217/504
  5. 217/504 simplified gives 31/72
  6. So, 7/72 + 21/63 = 31/72

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