1. The problem states: "If 25% of a number is 75, what is the number?". 2. Let the number be $x$. 3. We know that 25% of $x$ is equal to 75, so we can write the equation: $$0.25x = 75$$. 4. To find $x$, divide both sides by 0.25: $$x = \frac{75}{0.25}$$ 5. Calculate the division: $$x = 300$$ 6. Therefore, the number is 300.