Answers

Add 80/70 and 60/90

1^st number: 1 10/70, 2^nd number: 60/90

80/70 + 60/90 is 38/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 70 × 9 = 630,
   80/70 = 80 × 9/70 × 9 = 720/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   60/90 = 60 × 7/90 × 7 = 420/630
4. Add the two like fractions:
   720/630 + 420/630 = 720 + 420/630 = 1140/630
5. 1140/630 simplified gives 38/21
6. So, 80/70 + 60/90 = 38/21
   In mixed form: 117/21

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