 So, what if you were asked to make up 500 mils of a 6% sucrose solution? So, remember, percentage in this case, this is a weight per volume concentration, it means that if you were going to make up 100 mils of sucrose solution, you would need 6 grams of sucrose dissolved in water to bring up to a final volume of 100 mils of solution. So we know that, but we're required to make 500 mils of this solution. So that means we know that we need to make 500 mils solution. So we want to make sure that the proportion of solute solvent is going to be the same on both sides of our equation. So that means since we don't know how much grams of sucrose we need to add in 500 mils of solution, we're going to solve this by cross multiplication. So we make our unknown on one side of our equation. And therefore, if we carry this over to the other side, it's going to be 6 grams multiplied by 500 mils divided by 100 mils of solution. And if you notice, my volumes, they cross out. So whatever is left, we're going to get the grams, whatever this is represented in grams. So therefore, x would be equal to 30 grams of sucrose. So therefore, if I'm going to make up my 500 mils, which is 6 percent sucrose solution, I need, sorry, this is not 36, this is 36530. So if I'm going to make up 500 mils of my 6 percent sucrose solution, I actually need 30 grams of sucrose and I'm going to dissolve that in my water and then bring the volume up to 500 mils. That is how you would make up 500 mils of a 6 percent sucrose solution.