21 is what percent of 4977 - 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 4977 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 4977, so we can write it down as 100%=4977.
4. We know, that x% equals 21 of the output value, so we can write it down as x%=21.
5. Now we have two simple equations:
1) 100%=4977
2) x%=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%=4977/21
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 21 is what percent of 4977

100%/x%=4977/21
(100/x)*x=(4977/21)*x       - we multiply both sides of the equation by x
100=237*x       - we divide both sides of the equation by (237) to get x
100/237=x
0.42194092827004=x
x=0.42194092827004

now we have:
21 is 0.42194092827004% of 4977