Answers

Add 72/10 and 75/21

1^st number: 7 2/10, 2^nd number: 3 12/21

72/10 + 75/21 is 377/35.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 21 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 10 × 21 = 210,
   72/10 = 72 × 21/10 × 21 = 1512/210
3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
   75/21 = 75 × 10/21 × 10 = 750/210
4. Add the two like fractions:
   1512/210 + 750/210 = 1512 + 750/210 = 2262/210
5. 2262/210 simplified gives 377/35
6. So, 72/10 + 75/21 = 377/35
   In mixed form: 1027/35

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