Answers

Add 90/12 and 72/63

1^st number: 7 6/12, 2^nd number: 1 9/63

90/12 + 72/63 is 121/14.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 63 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 12 × 21 = 252,
   90/12 = 90 × 21/12 × 21 = 1890/252
3. Likewise, for the 2nd fraction, since 63 × 4 = 252,
   72/63 = 72 × 4/63 × 4 = 288/252
4. Add the two like fractions:
   1890/252 + 288/252 = 1890 + 288/252 = 2178/252
5. 2178/252 simplified gives 121/14
6. So, 90/12 + 72/63 = 121/14
   In mixed form: 89/14

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