What is 17/20,19/20, 0.19, 0.24 in order from greatest to least

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Can someone answer this question for me

Sam is a waiter at a local restaurant where he earns wages of $5 per hour sam figures that he also eams about $3 in tips for each person he serves sam works 6 hours on a particular day. if n represents the number of people sam serves that day, which of the following functions could sam use to figure ehis total earings for the do o a. en) = 30 o b. en) = 5n+ 18