21 is what percent of 167 - 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 167 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 167, so we can write it down as 100%=167.
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%=167
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%=167/21
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 167

100%/x%=167/21
(100/x)*x=(167/21)*x       - we multiply both sides of the equation by x
100=7.952380952381*x       - we divide both sides of the equation by (7.952380952381) to get x
100/7.952380952381=x
12.574850299401=x
x=12.574850299401

now we have:
21 is 12.574850299401% of 167