Ashipping company charge $15 to ship a package and 5% the shipping charge for the shirts on the package what was a total cost to ship this particular item

Since we have a 5% shipping charge, the total cost will be the price of shipping + the shipping charge so how do we find the shipping charge . Well in math the word "of" means times so to fins 5% OF 15 we multiply.
 
5% x 15

We need to convert the percent to decimal in order to do multiplication so divide it by 100 ( move the decimal twice to the left)
.05 x 15 = .75

So the shipping charge is .75 or 75 cents now we need to add it into the original cost to find the total.

$15 + $0.75 = $15.75 

Hope this helped have a great day :)

In this problem it decreased 20%