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Add 16/72 and 3/21

16/72 + 3/21 is 23/63.

Steps for adding fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 504
  2. For the 1st fraction, since 72 × 7 = 504,
    16/72 = 16 × 7/72 × 7 = 112/504
  3. Likewise, for the 2nd fraction, since 21 × 24 = 504,
    3/21 = 3 × 24/21 × 24 = 72/504
  4. Add the two like fractions:
    112/504 + 72/504 = 112 + 72/504 = 184/504
  5. 184/504 simplified gives 23/63
  6. So, 16/72 + 3/21 = 23/63

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