Answers

Add 72/35 and 28/20

1^st number: 2 2/35, 2^nd number: 1 8/20

72/35 + 28/20 is 121/35.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 35 and 20 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 35 × 4 = 140,
   72/35 = 72 × 4/35 × 4 = 288/140
3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
   28/20 = 28 × 7/20 × 7 = 196/140
4. Add the two like fractions:
   288/140 + 196/140 = 288 + 196/140 = 484/140
5. 484/140 simplified gives 121/35
6. So, 72/35 + 28/20 = 121/35
   In mixed form: 316/35

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