4.21 is what percent of 54.21 - 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 54.21 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 54.21, so we can write it down as 100%=54.21.
4. We know, that x% equals 4.21 of the output value, so we can write it down as x%=4.21.
5. Now we have two simple equations:
1) 100%=54.21
2) x%=4.21
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%=54.21/4.21
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 4.21 is what percent of 54.21

100%/x%=54.21/4.21
(100/x)*x=(54.21/4.21)*x       - we multiply both sides of the equation by x
100=12.87648456057*x       - we divide both sides of the equation by (12.87648456057) to get x
100/12.87648456057=x
7.7660948164545=x
x=7.7660948164545

now we have:
4.21 is 7.7660948164545% of 54.21