21 is what percent of 2436 - step by step solution

To get the solution, we are looking for, we need to point out what we know.

1. We assume, that the number 2436 is 100% - because it's the output value of the task.
2. We assume, that x is the value we are looking for.
3. If 100% equals 2436, so we can write it down as 100%=2436.
4. We know, that x% equals 21 of the output value, so we can write it down as x%=21.
5. Now we have two simple equations:
1) 100%=2436
2) x%=21
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
100%/x%=2436/21
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 21 is what percent of 2436

100%/x%=2436/21
(100/x)*x=(2436/21)*x       - we multiply both sides of the equation by x
100=116*x       - we divide both sides of the equation by (116) to get x
100/116=x
0.86206896551724=x
x=0.86206896551724

now we have:
21 is 0.86206896551724% of 2436