Answers

Add 84/12 and 63/90

1^st number: 7 0/12, 2^nd number: 63/90

84/12 + 63/90 is 77/10.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 90 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 12 × 15 = 180,
   84/12 = 84 × 15/12 × 15 = 1260/180
3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
   63/90 = 63 × 2/90 × 2 = 126/180
4. Add the two like fractions:
   1260/180 + 126/180 = 1260 + 126/180 = 1386/180
5. 1386/180 simplified gives 77/10
6. So, 84/12 + 63/90 = 77/10
   In mixed form: 77/10

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