Answers

Add 80/9 and 90/70

1^st number: 8 8/9, 2^nd number: 1 20/70

80/9 + 90/70 is 641/63.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 9 and 70 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 9 × 70 = 630,
   80/9 = 80 × 70/9 × 70 = 5600/630
3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
   90/70 = 90 × 9/70 × 9 = 810/630
4. Add the two like fractions:
   5600/630 + 810/630 = 5600 + 810/630 = 6410/630
5. 6410/630 simplified gives 641/63
6. So, 80/9 + 90/70 = 641/63
   In mixed form: 1011/63

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