Question 1184563
Hamster finished still retained this much after the second day:
{{{420-(2/5)420-(1/3)420}}} according to the description.


Retained at end of second day
{{{420-308}}}
{{{112}}}


On the day #3, hamster ate 41 grams of food.  He then had retained {{{112-41=highlight(71)}}}{{{grams}}}.