If you have a number, for example, 100, and add 50 percent, this is equal to 100 + 50 = 150. If you then increase the number 150 by 50 percent, you will get 150 + 75 = 225. Therefore, this is not the same as doubling. by ayaz khan

Think of it like this, you have 2 dollars. 2 dollars is 100 percent, so 150 is 3 dollars. However there is no negative percentage, so if you have 2 dollars can you take away 3? No, so that means u can never have a deduction of more than you have with percentages.