67 is what percent of 646 - 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 646 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 646, so we can write it down as 100%=646.
4. We know, that x% equals 67 of the output value, so we can write it down as x%=67.
5. Now we have two simple equations:
1) 100%=646
2) x%=67
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%=646/67
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 67 is what percent of 646

100%/x%=646/67
(100/x)*x=(646/67)*x       - we multiply both sides of the equation by x
100=9.6417910447761*x       - we divide both sides of the equation by (9.6417910447761) to get x
100/9.6417910447761=x
10.371517027864=x
x=10.371517027864

now we have:
67 is 10.371517027864% of 646