Answers

Add 70/42 and 84/45

1^st number: 1 28/42, 2^nd number: 1 39/45

70/42 + 84/45 is 53/15.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 45 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 42 × 15 = 630,
   70/42 = 70 × 15/42 × 15 = 1050/630
3. Likewise, for the 2nd fraction, since 45 × 14 = 630,
   84/45 = 84 × 14/45 × 14 = 1176/630
4. Add the two like fractions:
   1050/630 + 1176/630 = 1050 + 1176/630 = 2226/630
5. 2226/630 simplified gives 53/15
6. So, 70/42 + 84/45 = 53/15
   In mixed form: 38/15

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