Step-by-step explanation: If the upper bound and lower bound is asked to a tenth then divide 0.1 by 2 and add 0.05 to 80.0 for the upper bound and minus 0.05 from 80.0 t get the lower bound.
Step-by-step explanation: Change the percentage 20% into a decimal so .20. Then since you are taking away from the 40 gallons divide 40 by .20 to get 200 gallons
