Your purchase at the grocery store is $42 and there is an 8% sales tax. What is the amount of tax
you
will pay?

$45.36 you will pay
Put 42 in ur calculator and then add 8% and then press enter u will get 45.36

Or other way to do it 8% basically mean 8 divided by 100 calculate it u will get 0.08 multiply this number by 42 u will get 3.36 this is how much tax u should pay so add it to the price without tax 42+3.36= 45.36.