Answers

Add 75/20 and 75/90

1^st number: 3 15/20, 2^nd number: 75/90

75/20 + 75/90 is 55/12.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 90 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 20 × 9 = 180,
   75/20 = 75 × 9/20 × 9 = 675/180
3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
   75/90 = 75 × 2/90 × 2 = 150/180
4. Add the two like fractions:
   675/180 + 150/180 = 675 + 150/180 = 825/180
5. 825/180 simplified gives 55/12
6. So, 75/20 + 75/90 = 55/12
   In mixed form: 47/12

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