Answers

Add 81/20 and 90/16

1^st number: 4 1/20, 2^nd number: 5 10/16

81/20 + 90/16 is 387/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 16 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 20 × 4 = 80,
   81/20 = 81 × 4/20 × 4 = 324/80
3. Likewise, for the 2nd fraction, since 16 × 5 = 80,
   90/16 = 90 × 5/16 × 5 = 450/80
4. Add the two like fractions:
   324/80 + 450/80 = 324 + 450/80 = 774/80
5. 774/80 simplified gives 387/40
6. So, 81/20 + 90/16 = 387/40
   In mixed form: 927/40

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