11 lbs 5 oz - 1 lb 15 oz...we are gonna have to borrow...there is 16 oz in a lb. 11 lbs 5 oz....we r going to borrow 1 lb from the right side and add it to the left side making it 10 lbs and 21 oz...u see what I did...I borrowed 1 lb from the right side and added 16 oz to the left.Now we can subtract.
10 lbs 21 oz - 1 lb 15 oz = 9 lbs 6 oz <== ur answer