Here's how to figure out the net change in temperature from Neptune to Mars:

1. Average Temperatures:

* Neptune: Average temperature is about -214°C (-353°F)

* Mars: Average temperature is about -63°C (-81°F)

2. Calculate the Difference:

* Subtract Mars's average temperature from Neptune's average temperature:

-214°C - (-63°C) = -151°C

Answer: The net change in temperature from Neptune to Mars is -151°C. This means that Mars is significantly warmer than Neptune.