Answers

Add 20/45 and 63/20

1^st number: 20/45, 2^nd number: 3 3/20

20/45 + 63/20 is 647/180.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 20 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 45 × 4 = 180,
   20/45 = 20 × 4/45 × 4 = 80/180
3. Likewise, for the 2nd fraction, since 20 × 9 = 180,
   63/20 = 63 × 9/20 × 9 = 567/180
4. Add the two like fractions:
   80/180 + 567/180 = 80 + 567/180 = 647/180
5. So, 20/45 + 63/20 = 647/180
   In mixed form: 3107/180

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