Answers

Add 72/70 and 6/80

1^st number: 1 2/70, 2^nd number: 6/80

72/70 + 6/80 is 309/280.

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,
   72/70 = 72 × 8/70 × 8 = 576/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   6/80 = 6 × 7/80 × 7 = 42/560
4. Add the two like fractions:
   576/560 + 42/560 = 576 + 42/560 = 618/560
5. 618/560 simplified gives 309/280
6. So, 72/70 + 6/80 = 309/280
   In mixed form: 129/280

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