Answers

Add 81/90 and 64/20

1^st number: 81/90, 2^nd number: 3 4/20

81/90 + 64/20 is 41/10.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 20 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 90 × 2 = 180,
   81/90 = 81 × 2/90 × 2 = 162/180
3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
   64/20 = 64 × 9/20 × 9 = 576/180
4. Add the two like fractions:
   162/180 + 576/180 = 162 + 576/180 = 738/180
5. 738/180 simplified gives 41/10
6. So, 81/90 + 64/20 = 41/10
   In mixed form: 41/10

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