What is 990 percent of 65 - 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 65 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 65 is 100%, so we can write it down as 65=100%.
4. We know, that x is 990% of the output value, so we can write it down as x=990%.
5. Now we have two simple equations:
1) 65=100%
2) x=990%
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:
65/x=100%/990%
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 990% of 65

65/x=100/990
(65/x)*x=(100/990)*x       - we multiply both sides of the equation by x
65=0.1010101010101*x       - we divide both sides of the equation by (0.1010101010101) to get x
65/0.1010101010101=x
643.5=x
x=643.5

now we have:
990% of 65=643.5