Percentages Basics and Formulas
First, you are remembering these percentage values before solving the questions because these are the basics and are important for easily and quickly solving the problems.
| Fraction | Percentage | Fraction | Percentage | Fraction | Percentage |
|---|---|---|---|---|---|
| 1/2 | 50% | 1/3 | 33.33% | 1/4 | 25% |
| 1/5 | 20% | 1/6 | 16.67% | 1/7 | 14.28% |
| 1/8 | 12.5% | 1/9 | 11.11% | 1/10 | 10% |
| 1/11 | 9.09% | 1/12 | 8.33% | 1/13 | 7.69% |
| 1/14 | 7.14% | 1/15 | 6.66% | 1/16 | 6.25% |
| 5/6 | 83.33% | 3/8 | 37.5% | 5/8 | 62.5% |
| 7/8 | 87.5% | 3/11 | 27.27% | 2/3 | 66.66% |
| 7/3 | 233.33% | 9/8 | 112.5% | 2/7 | 28.57% |
If you can convert any percentage value to a fraction value, it is easy to solve the problems, so the above values you can remember.
The same questions are asking the price of book is 20% increase or decrease You approach two ways one percentage-based and other is fraction-base
Percentage-based: If any exam asks the above way, you can simply assume the initial value is 100%, and next you can add or subtract the values in the initial. If in the question it increases 20%, you can add 20% to the initial value (100%), and next, decreasing 20%, you can subtract 20% from to initial value (100%).
Initial value = 100%
Increasing 20%
Decreasing 20%
100% ➝ -20% ➝ 80%
Denominator value (initial value) = 5
Numerator value = 1
Increasing = 20%
5 ➝ +1 ➝ 6
Decreasing = 20%
5 ➝ -1 ➝ 4
In some questions, the asking price of the book is first increasing by a% and increasing by b%. You can approach the successive percentage of two values formula, i.e
In this formula, + and – values depend upon the increasing and decreasing of the values in question. If it is increasing, you put a + value, and if it is decreasing, you can put a – value
Similarly, successive formulas for three values also
Some questions asking for x, is how much % more or less than y?
You must confuse this problem if there are any question %more or less, you use this formula, i.e
%More or less = Difference value (x-y) / after you put in values, i.e., y value * 100
Here is the basic of the basic percentage if anyone I forgets I updated this post
There are different types of problems solved in percentages, i.e, election-based, income-based, and allegation-mixture based, geometry based, Population-based, etc we will cover every topic on percentages. Stay connected with our website Exam guru and social media for fast updates.
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