Answers

Add 9/63 and 12/40

9/63 + 12/40 is 31/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 40 is 2520
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2520
2. For the 1st fraction, since 63 × 40 = 2520,
   9/63 = 9 × 40/63 × 40 = 360/2520
3. Likewise, for the 2nd fraction, since 40 × 63 = 2520,
   12/40 = 12 × 63/40 × 63 = 756/2520
4. Add the two like fractions:
   360/2520 + 756/2520 = 360 + 756/2520 = 1116/2520
5. 1116/2520 simplified gives 31/70
6. So, 9/63 + 12/40 = 31/70

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