Answers

Add 42/10 and 84/28

1^st number: 4 2/10, 2^nd number: 3 0/28

42/10 + 84/28 is 36/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 28 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 10 × 14 = 140,
   42/10 = 42 × 14/10 × 14 = 588/140
3. Likewise, for the 2nd fraction, since 28 × 5 = 140,
   84/28 = 84 × 5/28 × 5 = 420/140
4. Add the two like fractions:
   588/140 + 420/140 = 588 + 420/140 = 1008/140
5. 1008/140 simplified gives 36/5
6. So, 42/10 + 84/28 = 36/5
   In mixed form: 71/5

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