Answers

Add 90/27 and 84/63

1^st number: 3 9/27, 2^nd number: 1 21/63

90/27 + 84/63 is 14/3.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 27 and 63 is 189
   
   Next, find the equivalent fraction of both fractional numbers with denominator 189
2. For the 1st fraction, since 27 × 7 = 189,
   90/27 = 90 × 7/27 × 7 = 630/189
3. Likewise, for the 2nd fraction, since 63 × 3 = 189,
   84/63 = 84 × 3/63 × 3 = 252/189
4. Add the two like fractions:
   630/189 + 252/189 = 630 + 252/189 = 882/189
5. 882/189 simplified gives 14/3
6. So, 90/27 + 84/63 = 14/3
   In mixed form: 42/3

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