13 is what percent of 1664 - 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 1664 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 1664, so we can write it down as 100%=1664.
4. We know, that x% equals 13 of the output value, so we can write it down as x%=13.
5. Now we have two simple equations:
1) 100%=1664
2) x%=13
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%=1664/13
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 13 is what percent of 1664

100%/x%=1664/13
(100/x)*x=(1664/13)*x       - we multiply both sides of the equation by x
100=128*x       - we divide both sides of the equation by (128) to get x
100/128=x
0.78125=x
x=0.78125

now we have:
13 is 0.78125% of 1664