75 percent of a number is the same as 0.75 of that number.
So the equation is:
0.75 * x = 411
Divide both sides by 0.75
x = $${\frac{{\mathtt{411}}}{{\mathtt{0.75}}}} = {\mathtt{548}}$$
kitty<3 is correct again. The answer is x=548. Thumbs up for you, kitty<3. I will give you points!