Answers

Add 9/63 and 7/20

9/63 + 7/20 is 69/140.

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,
   9/63 = 9 × 20/63 × 20 = 180/1260
3. Likewise, for the 2nd fraction, since 20 × 63 = 1260,
   7/20 = 7 × 63/20 × 63 = 441/1260
4. Add the two like fractions:
   180/1260 + 441/1260 = 180 + 441/1260 = 621/1260
5. 621/1260 simplified gives 69/140
6. So, 9/63 + 7/20 = 69/140

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