How to convert percentages to the right number

A

Athbi

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I'm not a student so I just want to know what is the equation to solve something like this
For example: let's say I'm playing a game and there is an achievement and there is only 0.31% of the total players who achieved that achievement let's put the numbers together so it could be easier to understand
Total number of players = 2000000
Only 0.31% of them achieved an achievement
What is the exact number of players who achieved that achievement
Note: that was an example I don't want the solution I just want the equation about how to solve this kind of maths
 
One must be careful with this sort of business. You MAY get partial people. What are you going to think about that?

% MEANS "parts per 100"

0.31% MEANS "0.31 per 100"
Multiplying by 10, 3.1 per 1,000
Multiplying by 10, 31 per 10,000
Multiplying by 10, 310 per 100,000

What can you tell me about ______ per 2,000,000
 
Are you sure that you mean 0.31%. That is NOT 31 percent, simply because 0.31 is NOT 31.

If you actually wanted 31 percent, that would be 31%
 
Athbi said:
I'm not a student so I just want to know what is the equation to solve something like this
For example: let's say I'm playing a game and there is an achievement and there is only 0.31% of the total players who achieved that achievement let's put the numbers together so it could be easier to understand
Total number of players = 2000000 Only 0.31% of them achieved an achievement
What is the exact number of players who achieved that achievement
Note: that was an example I don't want the solution I just want the equation about how to solve this kind of maths
Click to expand...
\(0.31=31\cdot 10^{-2}\) thus \(0.31\%=31\cdot 10^{-4}\) and \(2,000,000=2\cdot 10^6\).​
 
It's not an "equation" but a rule that, since our standard numeration system is "base 10", multiplying by 10 moves the decimal point one place to the right (32.534 times 10 is 325.34) and dividing by 10 moves the decimal point one place to the left (32.535 divided by 10 is 3.2535).

Yes, 0.31 is 31 x 10^{-2} since going form 31 to 0.31 we must move the decimal point two places to the left- dividing by 10 twice. And 10^(-2)= 1/100= (1/10)(1/10).

0.31% is .0031 and going from .0031 to 31 requires moving the decimal point four places to the right. That is 31 x 10^(-4).

To go from 2.0 to 2,000,000 we need to move the decimal point 6 place to the left, 10^6. 2,000,000= 2 x 10^6.

So 0.31% (NOT 31%) of 2,000,000 is 31x 10^(-4) times 3 x 10^6= 62 x 10^2 which is the same as 6200.
 
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