"John spent 2/5 of his money and had $240 left."
First, we know that 3/5 of the money is $240 dollars. If we want to figure out 1/5 of the money we just have to divide 240 by 3!
240 divided by 3 is 80!
To figure out 2/5 we just multiply 80 by 2 which is 160!
"George spent 4 times as much money as John and had 1/3 of his money left"
We know that John spent $160 so 4 times 160 is just multiplication!
4 times 160 is 640!
We know that 640 is 2/3 of George's money, so to figure out 1/3 we just divide 640 by 2!
620 divided by 2 is 320!
320 is 1/3 so multiplying 320 by 3 will get us our answer
The full amount of George's money is 960!
Hope this helped! 
