Answers

Add 72/45 and 90/12

1^st number: 1 27/45, 2^nd number: 7 6/12

72/45 + 90/12 is 91/10.

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,
   72/45 = 72 × 4/45 × 4 = 288/180
3. Likewise, for the 2nd fraction, since 12 × 15 = 180,
   90/12 = 90 × 15/12 × 15 = 1350/180
4. Add the two like fractions:
   288/180 + 1350/180 = 288 + 1350/180 = 1638/180
5. 1638/180 simplified gives 91/10
6. So, 72/45 + 90/12 = 91/10
   In mixed form: 91/10

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