Answers

Add 63/84 and 42/63

63/84 + 42/63 is 17/12.

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,
   63/84 = 63 × 3/84 × 3 = 189/252
3. Likewise, for the 2nd fraction, since 63 × 4 = 252,
   42/63 = 42 × 4/63 × 4 = 168/252
4. Add the two like fractions:
   189/252 + 168/252 = 189 + 168/252 = 357/252
5. 357/252 simplified gives 17/12
6. So, 63/84 + 42/63 = 17/12
   In mixed form: 15/12

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