Answers

Add 81/20 and 63/35

1^st number: 4 1/20, 2^nd number: 1 28/35

81/20 + 63/35 is 117/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 35 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 20 × 7 = 140,
   81/20 = 81 × 7/20 × 7 = 567/140
3. Likewise, for the 2nd fraction, since 35 × 4 = 140,
   63/35 = 63 × 4/35 × 4 = 252/140
4. Add the two like fractions:
   567/140 + 252/140 = 567 + 252/140 = 819/140
5. 819/140 simplified gives 117/20
6. So, 81/20 + 63/35 = 117/20
   In mixed form: 517/20

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