Answers

Add 72/56 and 21/12

1^st number: 1 16/56, 2^nd number: 1 9/12

72/56 + 21/12 is 85/28.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 56 and 12 is 168
   
   Next, find the equivalent fraction of both fractional numbers with denominator 168
2. For the 1st fraction, since 56 × 3 = 168,
   72/56 = 72 × 3/56 × 3 = 216/168
3. Likewise, for the 2nd fraction, since 12 × 14 = 168,
   21/12 = 21 × 14/12 × 14 = 294/168
4. Add the two like fractions:
   216/168 + 294/168 = 216 + 294/168 = 510/168
5. 510/168 simplified gives 85/28
6. So, 72/56 + 21/12 = 85/28
   In mixed form: 31/28

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