142.9 is what percent of 4000 - 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 4000 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 4000, so we can write it down as 100%=4000.
4. We know, that x% equals 142.9 of the output value, so we can write it down as x%=142.9.
5. Now we have two simple equations:
1) 100%=4000
2) x%=142.9
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%=4000/142.9
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 142.9 is what percent of 4000

100%/x%=4000/142.9
(100/x)*x=(4000/142.9)*x       - we multiply both sides of the equation by x
100=27.991602519244*x       - we divide both sides of the equation by (27.991602519244) to get x
100/27.991602519244=x
3.5725=x
x=3.5725

now we have:
142.9 is 3.5725% of 4000