691 is what percent of 3911 - 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 3911 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 3911, so we can write it down as 100%=3911.
4. We know, that x% equals 691 of the output value, so we can write it down as x%=691.
5. Now we have two simple equations:
1) 100%=3911
2) x%=691
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%=3911/691
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 691 is what percent of 3911

100%/x%=3911/691
(100/x)*x=(3911/691)*x       - we multiply both sides of the equation by x
100=5.6599131693198*x       - we divide both sides of the equation by (5.6599131693198) to get x
100/5.6599131693198=x
17.668115571465=x
x=17.668115571465

now we have:
691 is 17.668115571465% of 3911