Brainliest will be given. Sorry for asking so many questions but I really don’t understand this topic area but if anyone could help and give a valid explanation I will really appreciate it <3 . ( The problem is in the picture above thanks love)

Answer:
16%
Step-by-step explanation:
First week- 200 stickers
Second week- 280 stickers
Third week- 168 stickers
40% of 200 = 80
40% of 280 = 112
200-168=32
32 is 16% of 200