Discounts and Sales Tax for Kids: Find the Sale Price and Total Cost (Grade 7 Math)

Hi, I'm Luna from DoodleBeez. Today we are shopping smart with percents. A discount takes money off the price. Sales tax adds money on. Let's learn how to work out both.

A jacket costs eighty dollars and is twenty five percent off. Change the percent to a decimal and multiply. Zero point two five times eighty is twenty. You save twenty dollars, so the sale price is sixty dollars.

Here is a shortcut. If you take twenty five percent off, you still pay seventy five percent. Zero point seven five times eighty is sixty. Same sale price, in just one step.

Sales tax works the other way. Say the tax is five percent on sixty dollars. Zero point zero five times sixty is three dollars of tax. Add it on, and the total is sixty three dollars.

Often you need both. Shoes cost forty dollars with twenty percent off. Forty times zero point eight is thirty two. Then add ten percent tax: three dollars and twenty cents. The total is thirty five dollars and twenty cents.

You can also find the percent discount. A game was fifty dollars and now costs thirty five. You save fifteen dollars. Fifteen out of fifty is zero point three, which is thirty percent off.

Now it's your turn. A bike costs one hundred twenty dollars and is fifteen percent off. What is the sale price? Pause and try. You save eighteen dollars, so the sale price is one hundred two dollars.

Great job! Remember, change the percent to a decimal and multiply. Subtract a discount, add a tax, and take the discount off before adding tax. Practice discounts and sales tax in Middle School Math at doodlebeez.com. See you next time!