425 degree for 30 minutes is equal to how long at 325 degress?

To convert cooking times between different temperatures, you can use a general rule of thumb that suggests lowering the temperature by 25 degrees Fahrenheit increases cooking time by about 10-15 minutes. Therefore, cooking at 325 degrees instead of 425 degrees may require approximately 45-50 minutes. However, it's always best to check for doneness and adjust as needed, as cooking times can vary based on the recipe and food type.