Answers

Add 84/70 and 54/18

1^st number: 1 14/70, 2^nd number: 3 0/18

84/70 + 54/18 is 21/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 18 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 70 × 9 = 630,
   84/70 = 84 × 9/70 × 9 = 756/630
3. Likewise, for the 2nd fraction, since 18 × 35 = 630,
   54/18 = 54 × 35/18 × 35 = 1890/630
4. Add the two like fractions:
   756/630 + 1890/630 = 756 + 1890/630 = 2646/630
5. 2646/630 simplified gives 21/5
6. So, 84/70 + 54/18 = 21/5
   In mixed form: 41/5

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