Answers

Add 70/80 and 81/28

1^st number: 70/80, 2^nd number: 2 25/28

70/80 + 81/28 is 211/56.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 28 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 80 × 7 = 560,
   70/80 = 70 × 7/80 × 7 = 490/560
3. Likewise, for the 2nd fraction, since 28 × 20 = 560,
   81/28 = 81 × 20/28 × 20 = 1620/560
4. Add the two like fractions:
   490/560 + 1620/560 = 490 + 1620/560 = 2110/560
5. 2110/560 simplified gives 211/56
6. So, 70/80 + 81/28 = 211/56
   In mixed form: 343/56

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