Answers

Add 21/20 and 48/81

1^st number: 1 1/20, 2^nd number: 48/81

21/20 + 48/81 is 887/540.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 81 is 1620
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1620
2. For the 1st fraction, since 20 × 81 = 1620,
   21/20 = 21 × 81/20 × 81 = 1701/1620
3. Likewise, for the 2nd fraction, since 81 × 20 = 1620,
   48/81 = 48 × 20/81 × 20 = 960/1620
4. Add the two like fractions:
   1701/1620 + 960/1620 = 1701 + 960/1620 = 2661/1620
5. 2661/1620 simplified gives 887/540
6. So, 21/20 + 48/81 = 887/540
   In mixed form: 1347/540

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