Answers

Add 84/4 and 63/90

1^st number: 21 0/4, 2^nd number: 63/90

84/4 + 63/90 is 217/10.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 90 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 4 × 45 = 180,
   84/4 = 84 × 45/4 × 45 = 3780/180
3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
   63/90 = 63 × 2/90 × 2 = 126/180
4. Add the two like fractions:
   3780/180 + 126/180 = 3780 + 126/180 = 3906/180
5. 3906/180 simplified gives 217/10
6. So, 84/4 + 63/90 = 217/10
   In mixed form: 217/10

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