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Add 8/21 and 28/72

8/21 + 28/72 is 97/126.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 72 is 504

    Next, find the equivalent fraction of both fractional numbers with denominator 504
  2. For the 1st fraction, since 21 × 24 = 504,
    8/21 = 8 × 24/21 × 24 = 192/504
  3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
    28/72 = 28 × 7/72 × 7 = 196/504
  4. Add the two like fractions:
    192/504 + 196/504 = 192 + 196/504 = 388/504
  5. 388/504 simplified gives 97/126
  6. So, 8/21 + 28/72 = 97/126

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