Answers

Add 36/20 and 18/80

1^st number: 1 16/20, 2^nd number: 18/80

36/20 + 18/80 is 81/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 80 is 80
   
   Next, find the equivalent fraction of both fractional numbers with denominator 80
2. For the 1st fraction, since 20 × 4 = 80,
   36/20 = 36 × 4/20 × 4 = 144/80
3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
   18/80 = 18 × 1/80 × 1 = 18/80
4. Add the two like fractions:
   144/80 + 18/80 = 144 + 18/80 = 162/80
5. 162/80 simplified gives 81/40
6. So, 36/20 + 18/80 = 81/40
   In mixed form: 21/40

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