91 is what percent of 899 - 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 899 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 899, so we can write it down as 100%=899.
4. We know, that x% equals 91 of the output value, so we can write it down as x%=91.
5. Now we have two simple equations:
1) 100%=899
2) x%=91
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%=899/91
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 91 is what percent of 899

100%/x%=899/91
(100/x)*x=(899/91)*x       - we multiply both sides of the equation by x
100=9.8791208791209*x       - we divide both sides of the equation by (9.8791208791209) to get x
100/9.8791208791209=x
10.122358175751=x
x=10.122358175751

now we have:
91 is 10.122358175751% of 899