Answers

Add 98/70 and 16/80

1^st number: 1 28/70, 2^nd number: 16/80

98/70 + 16/80 is 8/5.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 80 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 70 × 8 = 560,
   98/70 = 98 × 8/70 × 8 = 784/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   16/80 = 16 × 7/80 × 7 = 112/560
4. Add the two like fractions:
   784/560 + 112/560 = 784 + 112/560 = 896/560
5. 896/560 simplified gives 8/5
6. So, 98/70 + 16/80 = 8/5
   In mixed form: 13/5

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