I need help ASAP :) thank you!

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

The frequency table shows the results of a survey comparing the number of beach towels sold for full price and at a discount during each of the three summer months. the store owner converts the frequency table to a conditional relative frequency table by row. which value should he use for x? round to the nearest hundredth. 0.89 0.90 0.92 0.96

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?