Answers

Add 9/63 and 40/60

9/63 + 40/60 is 17/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 60 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 60 × 21 = 1260,
   40/60 = 40 × 21/60 × 21 = 840/1260
4. Add the two like fractions:
   180/1260 + 840/1260 = 180 + 840/1260 = 1020/1260
5. 1020/1260 simplified gives 17/21
6. So, 9/63 + 40/60 = 17/21

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