And let me just write this as a decimal, 0.02. And now we just have to do a little bit of algebra to calculate this. So let's see how we could do this. So this could be rewritten as, we could divide both sides by 1.96, 1.96, one over 1.96. And so this would be equal to, on the left-hand side, we'd have the square root of all of this. But that's the same thing as the square root of 0.5 times 0.5, so that'd just be 0.5 over the square root of n. Needs to be less than or equal to, actually, let me write it this way. This is the same thing as two over 100.