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Add 10/21 and 42/72

10/21 + 42/72 is 89/84.

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,
    10/21 = 10 × 24/21 × 24 = 240/504
  3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
    42/72 = 42 × 7/72 × 7 = 294/504
  4. Add the two like fractions:
    240/504 + 294/504 = 240 + 294/504 = 534/504
  5. 534/504 simplified gives 89/84
  6. So, 10/21 + 42/72 = 89/84
    In mixed form: 15/84

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