How much heavier is a 9 1/8 pound box than a 2 5/6 pound box?

So let’s simplify the given situation.
We need to find out how much heavier is 91/8 lbs. compare to 2 5/6 lbs.
Since, it’s a combination of whole number and fraction; we cannot directly subtract this given equation. We need to convert the two given number into a fraction.
9 1/8 = 8 x 9 = 72 + 1 = 73, 73 is our numerator and 8 is our denominator
=> 73/8
2 5/6 = 6 x 2 = 12 + 5 = 17, 17 is our numerator and 6 is our denominator
=> 17/6

Now, we have 2 fractions with unlike denominator. In order to get a common denominator, we have to find their least common factor.

=> 73 - 17   = 73 x 6  - 17 x 8  
       8      6        8 x 6       6 x 8
=> 438 – 136  Now, we have the same denominator, subtract
      48       48
=> 302  or  151
       48          24
=> 6 7
       24
Therefore 9 1/8 lbs. is 6 7/24 lbs. heavier than 2 5/6 lbs.

The answer is 41.7 because 1.39 times 30 is 41.7