Answers

Add 12/84 and 40/63

12/84 + 40/63 is 7/9.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 63 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 84 × 3 = 252,
   12/84 = 12 × 3/84 × 3 = 36/252
3. Likewise, for the 2nd fraction, since 63 × 4 = 252,
   40/63 = 40 × 4/63 × 4 = 160/252
4. Add the two like fractions:
   36/252 + 160/252 = 36 + 160/252 = 196/252
5. 196/252 simplified gives 7/9
6. So, 12/84 + 40/63 = 7/9

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