Answers

Add 84/70 and 42/21

1^st number: 1 14/70, 2^nd number: 2 0/21

84/70 + 42/21 is 16/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 21 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 70 × 3 = 210,
   84/70 = 84 × 3/70 × 3 = 252/210
3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
   42/21 = 42 × 10/21 × 10 = 420/210
4. Add the two like fractions:
   252/210 + 420/210 = 252 + 420/210 = 672/210
5. 672/210 simplified gives 16/5
6. So, 84/70 + 42/21 = 16/5
   In mixed form: 31/5

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