Answers

Add 81/80 and 75/90

1^st number: 1 1/80, 2^nd number: 75/90

81/80 + 75/90 is 443/240.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 90 is 720
   
   Next, find the equivalent fraction of both fractional numbers with denominator 720
2. For the 1st fraction, since 80 × 9 = 720,
   81/80 = 81 × 9/80 × 9 = 729/720
3. Likewise, for the 2nd fraction, since 90 × 8 = 720,
   75/90 = 75 × 8/90 × 8 = 600/720
4. Add the two like fractions:
   729/720 + 600/720 = 729 + 600/720 = 1329/720
5. 1329/720 simplified gives 443/240
6. So, 81/80 + 75/90 = 443/240
   In mixed form: 1203/240

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