Every time they see a discount in a store, people perceive it as a bargain. However, in order to make the most rational decision, sometimes it is necessary to calculate the percentage savings. Knowing how much the discount is on a particular product can help everyone in everyday life.
The initial cost and the amount of the discount in rubles are known
How to calculate how many percent of the discount if you know the initial cost and the size of the discount? In other words, you need to determine by what percentage the price of the product has been reduced.
There are two main methods for calculating the discount percentage.
The first way is easier and more intuitive, but it contains a lot of mathematical operations. This means that if "inconvenient" values are given, there are more chances to make an error in the calculations. This method is suitable if integer, round numbers are given.
- First you need to calculate how many rubles (or other conditionalunits) is 1% of the total.
- Next, you should find out how many percent is the discount. To do this, you need to divide the savings in rubles by the value of 1%.
For example: a T-shirt cost 500 rubles, during the discounts it fell by 100 rubles.
- 500: 100=5 (rubles) - equals 1%.
- 100: 5=20% discount.
Conclusion: savings on purchase amounted to 20 percent.
The second method is probably more difficult to understand, but contains only one action, so the chance of making mistakes in the calculations is minimal. However, once this principle is learned, savings identification tasks will never again be difficult.
To get the result, you need to divide the amount of the discount by the price of the product or thing, and then multiply the resulting value by 100%. For example: a package of eggs cost 60 rubles, and then its price was reduced by 15 rubles.
(15: 60)100%=25%.
Conclusion: 25 percent savings.
Start and end costs are known
How to calculate the discount as a percentage, knowing the initial and final cost? There are two solutions.
Firstly, you can find out the size of the discount by subtracting the final cost from the initial one. Then solve the problem in the same way as described in the first part of the article.
For example: a T-shirt cost 500 rubles, and now it is sold for 400.
- 500 - 400=100 (rubles) - amounted to savings. Further solution from the first method.
- 500: 100=5 (rubles) - equals 1%.
- 100: 5=20% - discount.
Conclusion: 20% savings.
Secondly, you can calculate what percentage of the initial price is the discounted price, and then subtract this value from 100%.
For example: a package of eggs cost 60 rubles, and then its price was reduced to 45.
- (45: 60)100%=75%.
- 100% - 75%=25%.
Conclusion: the discount on the purchase of a package of eggs was 25 percent.
Now you can calculate the percentage discount when buying.
