Answers

Add 81/8 and 7/20

1^st number: 10 1/8, 2^nd number: 7/20

81/8 + 7/20 is 419/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 8 and 20 is 40
   
   Next, find the equivalent fraction of both fractional numbers with denominator 40
2. For the 1st fraction, since 8 × 5 = 40,
   81/8 = 81 × 5/8 × 5 = 405/40
3. Likewise, for the 2nd fraction, since 20 × 2 = 40,
   7/20 = 7 × 2/20 × 2 = 14/40
4. Add the two like fractions:
   405/40 + 14/40 = 405 + 14/40 = 419/40
5. So, 81/8 + 7/20 = 419/40
   In mixed form: 1019/40

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