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A 150 Minus 20 Percent

# 150 Minus 20 Percent

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During a recent vacation, a small group of friends dressed for dinner and ate a tasty burger. But upon return to the States, they noticed that their phones, backpacks, and sweatshirts had changed in weight. Similar to the games that interested our ancestors, the challenge was to find a way to add the missing 20 percent before the game ended. It didn’t take long.

### Divide

This is all nice, but we usually do not use percents just by themselves. Mostly, we want to answer how big is one number in relation to another number?. To try to visualize it, imagine that we have something everyone likes, for example, a large packet of cookies (or donuts or chocolates, whatever you prefer ðŸ˜‰ - we will stick to cookies). Let's try to find an answer to the question of what is 40% of 20? It is 40 hundredths of 20, so if we divided 20 cookies into 100 even parts (good luck with that!), 40 of those parts would be 40% of 20 cookies. Let's do the math:

www.omnicalculator.com)Let's go with something a bit harder and four times more delicious: 400 cookies! We're dividing them evenly, and every compartment gets four cookies. Cookies look smaller, but in our imagination, they are the same, just the drawer is much bigger! One percent of 400 is 4. How about 15 percent? It's 15 compartments times four cookies - 60 cookies. Our tummies start to ache a little, but it has never stopped us from eating more cookies! (Source:

### Price

In many countries and jurisdictions, it is mandatory to display the original price, the discount percent and the final price, but that is not always the case, meaning that the result from a percent off calculator might not give you the final price in all cases. You should be mindful of the local or regional jurisdiction when using our tool. A full reference list of U.S. state regulations is available on the NIST website under the title "U.S. Retail Pricing Laws and Regulations by State".

Usually there is no difference, except that you can have a certain percentage off as a part of a sale or liquidation, and not a single product discount, but this is a minor point. For most practical purposes the two are exactly the same so a percent off calculator can be used for both a discount and a coupon. In all cases, consider carefully whether you need the item, before purchasing it - you don't have to buy it just because it is some percentage off a higher price, it might still be overpriced, or it might simply not be the best fit for your needs. (Source: www.gigacalculator.com)

### Example

Let's briefly review what we've learned here. We looked into two different ways to calculate the percentage of a discount of an item in a store. The first step of the primary method is to use the formula S = p - rp, where S = sale price, r = discount percentage rate, and p = the original price. Using the alternative method, you look at the remaining percent of the price you'd be paying; for example, 90% is left if 10% is taken off. Convert that percentage to a decimal and multiply that by the original price. These two methods can both be used depending on which variables are known and unknown. So now you should be ready to go figure out how much you'll be paying next time you're at a Black Friday sale.

Let's first take a look at the answer format. Discount calculations imply dealing with monetary units, thus the answer should always be given in proper currency notation. The type of currency to use should match what's given in the original problem. Here we used dollars, but currency could be in any form. For this example, the correct answer is \$100. Additionally, it's appropriate to answer a word problem with a full sentence. Thus, the best answer to this word problem is: ''The mystery box costs \$100 after the discount has been applied.'' (Source: study.com)

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