Anyone who can answer these questions thanks you, could solve them but just really don’t feel like it lol

Last year you had 350 tracks on your music player. This year you have 28% more. How many tracks do you have altogether this year?

Last month you scored 500 points on a computer game. This month you scored 2% less. How many points did you score this month?

It took Jake 28 minutes to run 5km last month. This month he ran 5km in 21 minutes. By what percentage had Jake improved his running time?

A new car increased in price from £97600 to £158112. What percentage does that increase represent?

Find A if 30% of 30 plus 30