$25; 300% increase can u show me how to do this problem

The amount that is given in the question = $25
Percentage increase in the amount = 300%
Then
Amount of increase in the amount = (300/100) * 25
                                                       = 3 * 25 dollars
                                                       = 75 dollars
Then
The amount after increase = 25 + 75 dollars
                                             = 100 dollars
So the final amount after increase of 300% becomes $100. It is important to understand the requirement of the problem first. Once that is understood, the procedure is simple enough for you to understand.

300/100 * 25
300/100 = 3

So now:  3 * 25 = 75

25 + 75   = 100

Add units >>>>> 100 dollars

100 dollars