Answers

Add 40/20 and 21/54

1^st number: 2 0/20, 2^nd number: 21/54

40/20 + 21/54 is 43/18.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 54 is 540
   
   Next, find the equivalent fraction of both fractional numbers with denominator 540
2. For the 1st fraction, since 20 × 27 = 540,
   40/20 = 40 × 27/20 × 27 = 1080/540
3. Likewise, for the 2nd fraction, since 54 × 10 = 540,
   21/54 = 21 × 10/54 × 10 = 210/540
4. Add the two like fractions:
   1080/540 + 210/540 = 1080 + 210/540 = 1290/540
5. 1290/540 simplified gives 43/18
6. So, 40/20 + 21/54 = 43/18
   In mixed form: 27/18

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