Answers

Add 81/10 and 70/21

1^st number: 8 1/10, 2^nd number: 3 7/21

81/10 + 70/21 is 343/30.

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,
   81/10 = 81 × 21/10 × 21 = 1701/210
3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
   70/21 = 70 × 10/21 × 10 = 700/210
4. Add the two like fractions:
   1701/210 + 700/210 = 1701 + 700/210 = 2401/210
5. 2401/210 simplified gives 343/30
6. So, 81/10 + 70/21 = 343/30
   In mixed form: 1113/30

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