Answer: There are 0.4 ounces left in the can.
Step-by-step explanation:
The data we have is:
Chester weighs 6.8 pounds.
Chester can eat 3/4 of an ounce for each pound of body weight.
Then Chester can eat 6.8 times 3/4 of an ounce:
6.8*(3/4) ounces = 5.1 ounces
Then Chester should eat 5.1 ounces of canned food.
If the can has 5.5 ounces, then the amount that will be left in the can is:
5.5 oz - 5.1 oz = 0.4 oz
There are 0.4 ounces left in the can.