Answers

Add 90/84 and 45/3

1^st number: 1 6/84, 2^nd number: 15 0/3

90/84 + 45/3 is 225/14.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 3 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 84 × 1 = 84,
   90/84 = 90 × 1/84 × 1 = 90/84
3. Likewise, for the 2nd fraction, since 3 × 28 = 84,
   45/3 = 45 × 28/3 × 28 = 1260/84
4. Add the two like fractions:
   90/84 + 1260/84 = 90 + 1260/84 = 1350/84
5. 1350/84 simplified gives 225/14
6. So, 90/84 + 45/3 = 225/14
   In mixed form: 161/14

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