10 is what percent of 12990 - 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 12990 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 12990, so we can write it down as 100%=12990.
4. We know, that x% equals 10 of the output value, so we can write it down as x%=10.
5. Now we have two simple equations:
1) 100%=12990
2) x%=10
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%=12990/10
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 10 is what percent of 12990

100%/x%=12990/10
(100/x)*x=(12990/10)*x       - we multiply both sides of the equation by x
100=1299*x       - we divide both sides of the equation by (1299) to get x
100/1299=x
0.076982294072363=x
x=0.076982294072363

now we have:
10 is 0.076982294072363% of 12990