10 is what percent of 21.02 - 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 21.02 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 21.02, so we can write it down as 100%=21.02.
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%=21.02
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%=21.02/10
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 21.02

100%/x%=21.02/10
(100/x)*x=(21.02/10)*x       - we multiply both sides of the equation by x
100=2.102*x       - we divide both sides of the equation by (2.102) to get x
100/2.102=x
47.573739295909=x
x=47.573739295909

now we have:
10 is 47.573739295909% of 21.02