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Add 21/7 and 27/72

1st number: 3 0/7, 2nd number: 27/72

21/7 + 27/72 is 27/8.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 7 and 72 is 504

    Next, find the equivalent fraction of both fractional numbers with denominator 504
  2. For the 1st fraction, since 7 × 72 = 504,
    21/7 = 21 × 72/7 × 72 = 1512/504
  3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
    27/72 = 27 × 7/72 × 7 = 189/504
  4. Add the two like fractions:
    1512/504 + 189/504 = 1512 + 189/504 = 1701/504
  5. 1701/504 simplified gives 27/8
  6. So, 21/7 + 27/72 = 27/8
    In mixed form: 33/8

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