Answers

Add 81/20 and 35/28

1^st number: 4 1/20, 2^nd number: 1 7/28

81/20 + 35/28 is 53/10.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 28 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 28 × 5 = 140,
   35/28 = 35 × 5/28 × 5 = 175/140
4. Add the two like fractions:
   567/140 + 175/140 = 567 + 175/140 = 742/140
5. 742/140 simplified gives 53/10
6. So, 81/20 + 35/28 = 53/10
   In mixed form: 53/10

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