Answer:
The correct answer will be:

Step-by-step explanation:
It is given that :
Initial temperature, 
Final temperature,

Time taken :

Change in temperature per hour:

Putting the values of temperatures and time:

The error done by Wen was during calculating the values of fraction.
So, the correct answer is :
instead of
Say left is your mom and that would mean the answer would be 38922938829
The percent error is -2.1352% of Jocelyn's estimate. May I have Brainless