Think of quarters. 1 Quarter is equal to $0.25 and 4 quarters equal to 1.00. If you take a quarter away from your dollar you get 0.75. I would say the answer is 75.
25% is .25 as a decimal 100*.25=25 so 25% of 100 is equal to 25 because, 25% goes into 100% 4 times so we immediately know that where looking for a number that can go into 100 4 times and it just so happens that 25=25 is true and 100=100 is true so are answer is literally in the question.