Answers

Add 90/80 and 45/81

1^st number: 1 10/80, 2^nd number: 45/81

90/80 + 45/81 is 121/72.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 80 and 81 is 6480
   
   Next, find the equivalent fraction of both fractional numbers with denominator 6480
2. For the 1st fraction, since 80 × 81 = 6480,
   90/80 = 90 × 81/80 × 81 = 7290/6480
3. Likewise, for the 2nd fraction, since 81 × 80 = 6480,
   45/81 = 45 × 80/81 × 80 = 3600/6480
4. Add the two like fractions:
   7290/6480 + 3600/6480 = 7290 + 3600/6480 = 10890/6480
5. 10890/6480 simplified gives 121/72
6. So, 90/80 + 45/81 = 121/72
   In mixed form: 149/72

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