Lisa has a scholarship that pays 75% of her tuition for all four years she attends college. what is the total amount the scholarship is worth if lisa's classes cost 12,000 per year

Since you're given the total cost per year (12,000) you multiply it by 4 so that you get the total amount for the four years. e.g. (4 x 12,000) = 480,000
Now you calculate the 75% from this amount because we want to obtain the amount of money the scholarship is worth. That is 480,000 x 75% = 360,000
or 480,000 x 0.75 = 360,000
So, the scholarship is of 360,000