Answers

Add 42/21 and 98/5

1^st number: 2 0/21, 2^nd number: 19 3/5

42/21 + 98/5 is 108/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 5 is 105
   
   Next, find the equivalent fraction of both fractional numbers with denominator 105
2. For the 1st fraction, since 21 × 5 = 105,
   42/21 = 42 × 5/21 × 5 = 210/105
3. Likewise, for the 2nd fraction, since 5 × 21 = 105,
   98/5 = 98 × 21/5 × 21 = 2058/105
4. Add the two like fractions:
   210/105 + 2058/105 = 210 + 2058/105 = 2268/105
5. 2268/105 simplified gives 108/5
6. So, 42/21 + 98/5 = 108/5
   In mixed form: 213/5

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