A vacuum cleaner uses #5/8# kilowatts per hour. A clothes dryer uses #4 11/16# kilowatts per hour. How many hours can the vacuum run and use the same amount of energy as the clothes dryer does in one hour?
Vacuum cleaner uses
Clothes dryer uses
To see how many hours we can run the vacuum cleaner for using the same amount of energy as the dryer does for one hour, we can divide the vacuum cleaner energy into the dryer energy:
Jonas can run his vacuum for