How do you calculate discount in Javascript?

You will need to do this step if the percent off discount ends in a 5 rather than a 0 (for example, 35% or 55% off). It is easy to calculate 5% by simply dividing 10% of the original price by 2 , since 5% is half of 10%. For example, if 10% of $50 is $5, then 5% of $50 is $2.50, since $2.50 is half of $5.

First, convert the percentage discount to a decimal. A 20 percent discount is 0.20 in decimal format. Secondly, multiply the decimal discount by the price of the item to determine the savings in dollars. For example, if the original price of the item equals $24, you would multiply 0.2 by $24 to get $4.80.