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Add 18/72 and 21/56

18/72 + 21/56 is 5/8.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 56 is 504

    Next, find the equivalent fraction of both fractional numbers with denominator 504
  2. For the 1st fraction, since 72 × 7 = 504,
    18/72 = 18 × 7/72 × 7 = 126/504
  3. Likewise, for the 2nd fraction, since 56 × 9 = 504,
    21/56 = 21 × 9/56 × 9 = 189/504
  4. Add the two like fractions:
    126/504 + 189/504 = 126 + 189/504 = 315/504
  5. 315/504 simplified gives 5/8
  6. So, 18/72 + 21/56 = 5/8

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