Answers

Add 90/20 and 63/54

1^st number: 4 10/20, 2^nd number: 1 9/54

90/20 + 63/54 is 17/3.

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,
   90/20 = 90 × 27/20 × 27 = 2430/540
3. Likewise, for the 2nd fraction, since 54 × 10 = 540,
   63/54 = 63 × 10/54 × 10 = 630/540
4. Add the two like fractions:
   2430/540 + 630/540 = 2430 + 630/540 = 3060/540
5. 3060/540 simplified gives 17/3
6. So, 90/20 + 63/54 = 17/3
   In mixed form: 52/3

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