Answers

Add 72/35 and 70/80

1^st number: 2 2/35, 2^nd number: 70/80

72/35 + 70/80 is 821/280.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 35 and 80 is 560
   
   Next, find the equivalent fraction of both fractional numbers with denominator 560
2. For the 1st fraction, since 35 × 16 = 560,
   72/35 = 72 × 16/35 × 16 = 1152/560
3. Likewise, for the 2nd fraction, since 80 × 7 = 560,
   70/80 = 70 × 7/80 × 7 = 490/560
4. Add the two like fractions:
   1152/560 + 490/560 = 1152 + 490/560 = 1642/560
5. 1642/560 simplified gives 821/280
6. So, 72/35 + 70/80 = 821/280
   In mixed form: 2261/280

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