Jim has 3x as many books s vhalie. vharlie has 2/3 as manyas bob. bob has 27 books. how many books does jim have

First step is to figure out what you know. Which person has the known value of books? Bob. Great -- we'll start with him.

Now, who has something with relation to Bob? Charlie (I'm assuming that you made a typo). Since Charlie has 2/3 books as many as Bob, we need to find 2/3 of 27. There are two ways to do this, but if you're not using a calculator, the way I prefer is to divide by 3, then multiply by 2. What is 27/3?  9. What's 9*2? 18. That means that 18 is 2/3 of 27, and it is also the amount of books Charlie has. The last person we have to find the amount of books for is Jim. Jim has 3 times the amount of books Charlie has. What's 18*3? 54. Your answer is Jim has 54 books. =D