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Calculator finds solutions to common percentage problems. It's done in easy way: more like stories and everyday situations, less like math language.
Some facts
  • One percent (1%) is equal to fraction 1/100 or 0,01.
  • To convert some number into percent, you need to convert it to fraction with 100 denominator first. Then, nominator of fraction will tell you "number of percents". For example fraction 3/4 after converting to denominator 100 is equal to 75/100, so it's equal to 75% (simply 3/4 = 75%).
  • If you need calculate a percent of a number, you have to multiply that number by a proper fraction with 100 denominator. For example 50% from number 10 is equal to 50/100 · 10 = 5.
  • The concept of percentage is very useful and popular in many areas of our life, for example:
    • Income from bank deposit is usually defined as percent of capital, that you would earn after one year. It's so called annual rate of return.
    • Change in a value is often expressed as percentage of inital value. For example: the handbag is 20% cheaper than it was before the summer discount.
    • Concentration of one substance in another is often expressed in percentage values (percentage concentration). For example you can buy 3% solution of hydrogen peroxide to desinfect wounds. It means that in 100g of solution you'll get 3g of the active substance (i.e. hydroden peroxide).
How to use this tool

  • First of all, find the sentence in calculator, which describes your problem in the closest way. However, don't take those sentences too literally ! Those sentences describe example situations - like buying handbag under promotion. However, you can put any other product in this place. Be creative, don't waste your imagination.
  • Next, click on one of input fields in the sentence and enter your own value.
  • After you've entered the numbers in the particular sentence, the other part of a sentence will adjust automatically, displaying the correct number as a solution.
  • Remember - if you can't find a sentence describing your situation, feel free to drop us a word. We will be happy to add the missing case for you!

1. Basics:

% is equal to ? or?.
1.2. The number is equal to ?%.
The fraction
is equal to ?%.
1.4. % from the number is ?.

2. Shopping:

2.1. The bike was at a price of $. Next, its price has been raised by %. After that, the bike costs ? now.
2.2. I'm a regular customer in The Shop and I obtained % discount for future shopping. Regular price of washing machine is $, but I will pay only ?.
2.3. Yeah! There is a promotion this week - it's % discount for all products. Some nice handbag costs $ now. It means, the same handbag was at a price of ? before.
2.4. The mobile phone costs $ in first shop and $ in another one. It means that, price offered by second shop is ?.

3. Bills:

3.1. My usual electricity bill is about $ per month. Unfortunately, the bold man in TV was talking about upcoming increase of electricity price by %. It means I will pay ? each month which is ? more.
3.2. Flat owner increased my rent by $. Before that, I was paying $ to him. This means my rent has grown by ?%.
3.3. My monthly gas bill is $ in average. It turned out, that I would pay $ when I switch to another supplier. It will be ?.
percentage · percent · percents

Tags to Polish version:
procent · procenty