21.21 is what percent of 49.9 - 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 49.9 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 49.9, so we can write it down as 100%=49.9.
4. We know, that x% equals 21.21 of the output value, so we can write it down as x%=21.21.
5. Now we have two simple equations:
1) 100%=49.9
2) x%=21.21
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%=49.9/21.21
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 21.21 is what percent of 49.9

100%/x%=49.9/21.21
(100/x)*x=(49.9/21.21)*x       - we multiply both sides of the equation by x
100=2.3526638378124*x       - we divide both sides of the equation by (2.3526638378124) to get x
100/2.3526638378124=x
42.50501002004=x
x=42.50501002004

now we have:
21.21 is 42.50501002004% of 49.9