Answers

Add 16/70 and 98/80

1^st number: 16/70, 2^nd number: 1 18/80

16/70 + 98/80 is 407/280.

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,
   16/70 = 16 × 8/70 × 8 = 128/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   98/80 = 98 × 7/80 × 7 = 686/560
4. Add the two like fractions:
   128/560 + 686/560 = 128 + 686/560 = 814/560
5. 814/560 simplified gives 407/280
6. So, 16/70 + 98/80 = 407/280
   In mixed form: 1127/280

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