Answers

Add 80/70 and 98/90

1^st number: 1 10/70, 2^nd number: 1 8/90

80/70 + 98/90 is 703/315.

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,
   98/90 = 98 × 7/90 × 7 = 686/630
4. Add the two like fractions:
   720/630 + 686/630 = 720 + 686/630 = 1406/630
5. 1406/630 simplified gives 703/315
6. So, 80/70 + 98/90 = 703/315
   In mixed form: 273/315

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