The tax is the money on top of the original cost of the dinner. So, we need to find 5% of 24, as that is what the tax is at the restaurant - 5% of the price.
Ignore the part about her batting attempts, it is extra. Her winning ratio is 3/12 which is 1/4 simplified and if you do 1/4 or 3/12 you get 0.25 which is the decimal of how many games she won / how many total. To convert 0.25 to percentage multiply it by 100 to get 25% D
