Answers

Add 60/72 and 72/21

1^st number: 60/72, 2^nd number: 3 9/21

60/72 + 72/21 is 179/42.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 21 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   60/72 = 60 × 7/72 × 7 = 420/504
3. Likewise, for the 2nd fraction, since 21 × 24 = 504,
   72/21 = 72 × 24/21 × 24 = 1728/504
4. Add the two like fractions:
   420/504 + 1728/504 = 420 + 1728/504 = 2148/504
5. 2148/504 simplified gives 179/42
6. So, 60/72 + 72/21 = 179/42
   In mixed form: 411/42

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