Answers

Add 81/35 and 40/20

1^st number: 2 11/35, 2^nd number: 2 0/20

81/35 + 40/20 is 151/35.

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,
   81/35 = 81 × 4/35 × 4 = 324/140
3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
   40/20 = 40 × 7/20 × 7 = 280/140
4. Add the two like fractions:
   324/140 + 280/140 = 324 + 280/140 = 604/140
5. 604/140 simplified gives 151/35
6. So, 81/35 + 40/20 = 151/35
   In mixed form: 411/35

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