Answers

Add 80/35 and 20/72

1^st number: 2 10/35, 2^nd number: 20/72

80/35 + 20/72 is 323/126.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 35 and 72 is 2520
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2520
2. For the 1st fraction, since 35 × 72 = 2520,
   80/35 = 80 × 72/35 × 72 = 5760/2520
3. Likewise, for the 2nd fraction, since 72 × 35 = 2520,
   20/72 = 20 × 35/72 × 35 = 700/2520
4. Add the two like fractions:
   5760/2520 + 700/2520 = 5760 + 700/2520 = 6460/2520
5. 6460/2520 simplified gives 323/126
6. So, 80/35 + 20/72 = 323/126
   In mixed form: 271/126

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