Question

Solve the following and also please explain how you going the percent of discount. Do the evens only starting from number 10. Thanks!

Answer 1

$\frac{100-percent of discount}{100}$ × original price = sale price
put number of each item in equation and solve it
such as item 1
$\frac{100-20}{100}$×80=X
$\frac{80}{100}$×80=X
X=64