Answers

Add 80/63 and 9/20

1^st number: 1 17/63, 2^nd number: 9/20

80/63 + 9/20 is 2167/1260.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 20 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 63 × 20 = 1260,
   80/63 = 80 × 20/63 × 20 = 1600/1260
3. Likewise, for the 2nd fraction, since 20 × 63 = 1260,
   9/20 = 9 × 63/20 × 63 = 567/1260
4. Add the two like fractions:
   1600/1260 + 567/1260 = 1600 + 567/1260 = 2167/1260
5. So, 80/63 + 9/20 = 2167/1260
   In mixed form: 1907/1260

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