Answers

Add 90/45 and 70/12

1^st number: 2 0/45, 2^nd number: 5 10/12

90/45 + 70/12 is 47/6.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 45 and 12 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 45 × 4 = 180,
   90/45 = 90 × 4/45 × 4 = 360/180
3. Likewise, for the 2nd fraction, since 12 × 15 = 180,
   70/12 = 70 × 15/12 × 15 = 1050/180
4. Add the two like fractions:
   360/180 + 1050/180 = 360 + 1050/180 = 1410/180
5. 1410/180 simplified gives 47/6
6. So, 90/45 + 70/12 = 47/6
   In mixed form: 75/6

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