Question

How can you determine the total cost of an item including tax if you know the price of the item and the tax rate?

Answer 1

percent means partst out of 100 so
x%=x/100

ok so lets say
how to find total
total=how much you spent+(how much you spent times tax percent)
you can use distributive proerty to undistribute the 'how much you spent' (like ba+ac=a(b+c)) to get
total=how much you spent times (1+tax percent)
so what you do is
you know

how much you spent
tax percent so

1. convert tax percent to deceimal
2. plug into foormula
total cost=how much spent times (1+taxindecimalform)