Max buys a new laptop the original price is $800 he got it on sale for 30% off the original price how much money does he actually pay for the laptop

Max got it for $240. Thats what he actually paid.

They would take off $240 because of the 30% off. It would come out to $560 that he paid for the laptop. 

800/x=100/30
(800/x)*x=(100/30)*x  
800=3.33333333333*x
800/3.33333333333=x 
240=x 
x=240

 $800-$240=$560 that he paid.