As you learn about using percentages in real life examples are available to show you precisely how they are used in everyday settings, from sales tax to more.
Have you ever bought something on sale marked down by twenty percent? Or used a coupon to take 30% off? If so, you've used a discount. A discount is usually a percentage of the original price. The percentage is subtracted from the original price to determine the sale price.
Let's say a shirt costs $8, but it's been marked down by 50%. When you check out, 50% of $8 will be subtracted from the original price. How much would the shirt cost after the discount?
Click through the slideshow to learn how to calculate discounts.
Let's say a shirt costs eight dollars, but it's on sale for 50% off.
This means it will cost fifty percent less than the original price, or half as much.
This discount is a percentage of the original price. Here, 50% off means the discount is 50% of $8.
50%, or half, of 8 is 4. This means the shirt will cost $4 less than the original price.
Remember, the discount is taken off of the original price. So we'll subtract the discount from the original price.
8 minus 4 is 4.
So the shirt would cost four dollars on sale.
Let's try another example. What if the same shirt was on sale for 20% off?
This means it would cost twenty percent less than the original price. This time, it'll take a few more steps to find the final price.
The discount is 20% of $8.
Whenever, you see the phrase "of something" in a math sentence, it's usually a hint that you'll need to multiply.
So we'll multiply 8 by 20%.
Before we can do that, we'll need to convert 20% into a decimal.
We'll move the decimal point two places to the left...
We'll move the decimal point two places to the left...so 20% becomes 0.20.
Now we can multiply. 8 times 0.20 equals 1.60.
Another way to say this is that 20% of $8.00 is $1.60.
The shirt will cost $1.60 less than the original price of $8. So we'll subtract the discount from the original price.
8.00 minus 1.60 equals 6.40.
So the shirt would cost $6.40 on sale.
Find the final cost for each item.
You find a pair of shoes on sale for 35% off. They originally cost $90.00. What will they cost on sale?
You spend $42.00 on groceries, but you have a coupon for 10% off. What is the final price of your bill?
A bookstore is going out of business, so all books are 60% off. How much would you spend on a book that originally cost $12.95?