15 is what percent of 43 - 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 43 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 43, so we can write it down as 100%=43.
4. We know, that x% equals 15 of the output value, so we can write it down as x%=15.
5. Now we have two simple equations:
1) 100%=43
2) x%=15
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%=43/15
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 15 is what percent of 43

100%/x%=43/15
(100/x)*x=(43/15)*x       - we multiply both sides of the equation by x
100=2.86666666667*x       - we divide both sides of the equation by (2.86666666667) to get x
100/2.86666666667=x
34.8837209302=x
x=34.8837209302

now we have:
15 is 34.8837209302% of 43