Answers

Add 90/28 and 84/90

1^st number: 3 6/28, 2^nd number: 84/90

90/28 + 84/90 is 871/210.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 90 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 28 × 45 = 1260,
   90/28 = 90 × 45/28 × 45 = 4050/1260
3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
   84/90 = 84 × 14/90 × 14 = 1176/1260
4. Add the two like fractions:
   4050/1260 + 1176/1260 = 4050 + 1176/1260 = 5226/1260
5. 5226/1260 simplified gives 871/210
6. So, 90/28 + 84/90 = 871/210
   In mixed form: 431/210

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