Answers

Add 42/63 and 9/12

42/63 + 9/12 is 17/12.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 12 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 63 × 4 = 252,
   42/63 = 42 × 4/63 × 4 = 168/252
3. Likewise, for the 2nd fraction, since 12 × 21 = 252,
   9/12 = 9 × 21/12 × 21 = 189/252
4. Add the two like fractions:
   168/252 + 189/252 = 168 + 189/252 = 357/252
5. 357/252 simplified gives 17/12
6. So, 42/63 + 9/12 = 17/12
   In mixed form: 15/12

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