Help me please this is very hard i got 8ft but it said I was wrong!?

Officer brimberry wrote 24 tickets for traffic violations last week, but only 9 tickets this week. what is the percent decrease? give your answer to the nearest tenth of a percent.

What is the solution to the equation 9^(x+1) =27

Find three consecutive numbers such that the sum of one-fourth the first and one-fifth the second is five less than one-seventh the third