3 is 25% of what number?3 is the given number which is said to be the 25% of an unknown number.Let's follow the formula to be able to solve for the unknown answer.=> 25% = 25% / 100% = 0.25Solutions=> 0.25x = 3, where x is the value of the unknown number that we need to find out=> 0.25x / 0.25 = 3 / 0.25=> x = 12Therefore 12 is the unknown number that we are looking for and 3 is the 25% of it,