If the instructions for cooking a turkey state "Roast turkey at 325 degrees for 20 minutes per pound," how many hours will it take to roast a 20-pound turkey at this temperature?
It takes 20 minutes for 1 pound of turkey to be cooked at 365 degrees:
Create a proportion to solve for x, then cross-multiply.
Now that we have the minutes, we can solve for how many hours it would take. There are 60 minutes in an hour, which can be expressed as:
Divide by 60 to isolate for x: