Answers

Add 72/12 and 90/15

1^st number: 6 0/12, 2^nd number: 6 0/15

72/12 + 90/15 is 12/1.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 15 is 60
   
   Next, find the equivalent fraction of both fractional numbers with denominator 60
2. For the 1st fraction, since 12 × 5 = 60,
   72/12 = 72 × 5/12 × 5 = 360/60
3. Likewise, for the 2nd fraction, since 15 × 4 = 60,
   90/15 = 90 × 4/15 × 4 = 360/60
4. Add the two like fractions:
   360/60 + 360/60 = 360 + 360/60 = 720/60
5. 720/60 simplified gives 12/1
6. So, 72/12 + 90/15 = 12/1

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