Answers

Add 70/42 and 5/90

1^st number: 1 28/42, 2^nd number: 5/90

70/42 + 5/90 is 31/18.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 90 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 90 × 7 = 630,
   5/90 = 5 × 7/90 × 7 = 35/630
4. Add the two like fractions:
   1050/630 + 35/630 = 1050 + 35/630 = 1085/630
5. 1085/630 simplified gives 31/18
6. So, 70/42 + 5/90 = 31/18
   In mixed form: 113/18

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