Answers

Add 81/5 and 75/90

1^st number: 16 1/5, 2^nd number: 75/90

81/5 + 75/90 is 511/30.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 5 and 90 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 5 × 18 = 90,
   81/5 = 81 × 18/5 × 18 = 1458/90
3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
   75/90 = 75 × 1/90 × 1 = 75/90
4. Add the two like fractions:
   1458/90 + 75/90 = 1458 + 75/90 = 1533/90
5. 1533/90 simplified gives 511/30
6. So, 81/5 + 75/90 = 511/30
   In mixed form: 171/30

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