So let's see if we can use the empirical rule to answer this question, the area under the bell curve all the way up to 1, or everything to the left of 1. So the empirical rule tells us that this middle area between one standard deviation to the left and one standard deviation to the right, that right there is 68%. We saw that in the previous video as well. That's what the empirical rule tells us. Now, if that 68% we saw in the last video, that everything else combined, it all has to add up to 1, or to 100%, that this left-hand tail, let me draw it a little bit, this part right here, plus this part right here, has to add up, when you add it to 68, has to add up to 1, or to 100%. So those two combined are 32%. 32 plus 68 is 100.