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Add 40/42 and 54/72

40/42 + 54/72 is 143/84.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 72 is 504

    Next, find the equivalent fraction of both fractional numbers with denominator 504
  2. For the 1st fraction, since 42 × 12 = 504,
    40/42 = 40 × 12/42 × 12 = 480/504
  3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
    54/72 = 54 × 7/72 × 7 = 378/504
  4. Add the two like fractions:
    480/504 + 378/504 = 480 + 378/504 = 858/504
  5. 858/504 simplified gives 143/84
  6. So, 40/42 + 54/72 = 143/84
    In mixed form: 159/84

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