What does the % symbol do?

- Hey, look what I found, a calculator. … Know how on the calculator you have … this little percentage symbol right here? … So if you go to a restaurant and get a bill of $19 … and you go I want to pay 15% tip on this bill. … Then you would go 19 times 15 and then hit … the percentage button and you get the percentage, … so that's 2.85, so that would be 15% of 19 is 2.85. … That's how this percentage symbol works on a calculator. … What if you passed this here to JavaScript, … what do you think happens? … So 11 % or percent symbol, three. … The answer to this in JavaScript is two. … That makes sense, right? … Well, you see, in JavaScript this is not … a percent symbol, this is a symbol for modulus or remainder. … So what is actually happening here is we're saying … if you take 11 and then you use the number three … and you see how many threes you get here … and then I'm only interested in what's remaining. … So basically we say 11 is a one, two, three, four, … five, six, seven, eight, nine, 10, 11. …