3.99 is what percent of 1.29 - 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 1.29 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 1.29, so we can write it down as 100%=1.29.
4. We know, that x% equals 3.99 of the output value, so we can write it down as x%=3.99.
5. Now we have two simple equations:
1) 100%=1.29
2) x%=3.99
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%=1.29/3.99
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 3.99 is what percent of 1.29

100%/x%=1.29/3.99
(100/x)*x=(1.29/3.99)*x       - we multiply both sides of the equation by x
100=0.32330827067669*x       - we divide both sides of the equation by (0.32330827067669) to get x
100/0.32330827067669=x
309.3023255814=x
x=309.3023255814

now we have:
3.99 is 309.3023255814% of 1.29