A hotel room that is advertised at $120 per night. You notice in the fine print that there will be an additional 18% tax on the room. How much tax will you pay? How much will you actually be charged per night, including the tax?

The tax and the total per night is calculated with $120 * 118%. You then will get $120*1.18, which is, $141.6. To get the tax alone, you can multiply $120 to 18%, and get $21.6.

Remember that percentages are basically a fraction over 100. (Ex. 18% is 18/100. You can simplify it to 0.18)

It will cost $21.6 in tax each night alone, but will cost $141.6 in total.