Answers

Add 90/45 and 90/84

1^st number: 2 0/45, 2^nd number: 1 6/84

90/45 + 90/84 is 43/14.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 84 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 45 × 28 = 1260,
   90/45 = 90 × 28/45 × 28 = 2520/1260
3. Likewise, for the 2nd fraction, since 84 × 15 = 1260,
   90/84 = 90 × 15/84 × 15 = 1350/1260
4. Add the two like fractions:
   2520/1260 + 1350/1260 = 2520 + 1350/1260 = 3870/1260
5. 3870/1260 simplified gives 43/14
6. So, 90/45 + 90/84 = 43/14
   In mixed form: 31/14

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