Pizza Nutrition?

OK, I'm gonna spell this out in words, so you maybe can do it yourself. (Apparently, people putting it in formulas in those other threads didn't work for you.) Try to figure it out. Don't just keep asking us to do your math. You can learn this!

Consider your pizza packaging. It will tell you a serving size. The serving size will be either a fraction of the pizza (like 1/3) or a number of slices.

First, figure out the calories in the whole pizza.

If the serving size is a fraction (like 1/3 of the pizza), multiply the calories in a serving by the lower number in the fraction (3, in this case). Then, divide the result by the top number in the fraction (1, in this case). That gives you the number of calories in the whole pizza. (You'll soon see that if the top number in the fraction is a 1, you can skip the dividing step, but you'll need it if the top number isn't 1.)

On the other hand, if the serving size is a number of slices, look at the pizza. How many slices is it cut into? Take that number of slices, and multiply the number of slices by the calories per serving. This also is the number of calories in the whole pizza.

Now, regardless of how they designate the serving, you know the number of calories in the whole pizza.

But wait! What if you want to only eat part of the pizza!?

Well, you have to figure out the calories in the amount you're actually eating:

If you want to eat a fraction of the pizza, multiply the total number of calories in the pizza by that fraction. For example, if you're going to eat half the pizza, multiply the total number of calories in the whole pizza by 1/2. That's the calories in the amount you want to eat.

If you want to eat a certain number of slices, turn that number of slices into a fraction: The top number in the fraction is the number of slices you want to eat, and the bottom number is the number of slices in the whole pizza. For example, if you want to eat 2 slices of a pizza that's sliced into 6 pieces, put the 2 over the 6. The fraction is 2/6.

Now it's just like the other example: Multiply the number of calories in the whole pizza by that fraction (2/6 in the preceding example). That's the calories in the amount you want to eat.

I know, I know, it's a lot of words and steps. But take a deep breath, and work your way through it, one step at a time. You can do it! You won't need us! Get out your calculator (on your phone or computer). Go step by step, and write things down.

What's that you say? Your calculator doesn't have fractions? No problem! Any time you have a fraction, before you use it to multiply/divide with other stuff, divide the top number of the fraction by the bottom number. That result is the same thing as the fraction.

For example, 1/2 is the same as 0.5. 1/3 is the same as 0.3333333(etc.). If you get one of those goofy ones with lots of numbers in it, it's OK to use just a couple of the ones after the ".". For example, 1/3 is plenty close enough to 0.33 to make the latter useful. So, use it.

Now you know how to do this yourself. Yay! Please do: Practice is good!

And it works on other things besides pizza, too.