9.99 is what percent of 17.99 - 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 17.99 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 17.99, so we can write it down as 100%=17.99.
4. We know, that x% equals 9.99 of the output value, so we can write it down as x%=9.99.
5. Now we have two simple equations:
1) 100%=17.99
2) x%=9.99
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%=17.99/9.99
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 9.99 is what percent of 17.99

100%/x%=17.99/9.99
(100/x)*x=(17.99/9.99)*x       - we multiply both sides of the equation by x
100=1.8008008008008*x       - we divide both sides of the equation by (1.8008008008008) to get x
100/1.8008008008008=x
55.530850472485=x
x=55.530850472485

now we have:
9.99 is 55.530850472485% of 17.99