How is finding percent increase the same as finding percent decrease? How are they different don't say u don't know or ill report

So I have my own way of thinking:

So lets say a 25% increase of 60.

First what I would do is 25% x 60 = 15. THEN MAKE SURE YOU DON"T FORGET THIS STEP. You will have to do 60 + 15 = 75.

So that is for increase, you can do this with any numbers :).

So now lets say 25% decrease of 60.

First what I would do is 25% x 60 = 15 and then do 60 - 15 = 45. (Since we are decreasing)

So that is for the decrease, you can do this with any numbers :).

I HOPE THIS HELPS

amount of oatypop that contains the prize = 40%

amount   of oatypop which doesn't contain the prize = (100-40)=60%

probability that hannah will win a prize

    = s +f s +f f s+ff   f s+ff f f s+ infinity.where f= failure,s= success

=   or 60%

probability that hannah only has to buy 3 or less boxes before getting a prize= (s) and ( f s) and (ff s) and (f f f s)

        = = 87.04 %  

step-by-step explanation: