Answers

Add 28/84 and 21/10

1^st number: 28/84, 2^nd number: 2 1/10

28/84 + 21/10 is 73/30.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 10 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   28/84 = 28 × 5/84 × 5 = 140/420
3. Likewise, for the 2nd fraction, since 10 × 42 = 420,
   21/10 = 21 × 42/10 × 42 = 882/420
4. Add the two like fractions:
   140/420 + 882/420 = 140 + 882/420 = 1022/420
5. 1022/420 simplified gives 73/30
6. So, 28/84 + 21/10 = 73/30
   In mixed form: 213/30

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