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Add 21/72 and 6/28

21/72 + 6/28 is 85/168.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 28 is 504

    Next, find the equivalent fraction of both fractional numbers with denominator 504
  2. For the 1st fraction, since 72 × 7 = 504,
    21/72 = 21 × 7/72 × 7 = 147/504
  3. Likewise, for the 2nd fraction, since 28 × 18 = 504,
    6/28 = 6 × 18/28 × 18 = 108/504
  4. Add the two like fractions:
    147/504 + 108/504 = 147 + 108/504 = 255/504
  5. 255/504 simplified gives 85/168
  6. So, 21/72 + 6/28 = 85/168

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