What is 99.7 percent of 81 - 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 81 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 81 is 100%, so we can write it down as 81=100%.
4. We know, that x is 99.7% of the output value, so we can write it down as x=99.7%.
5. Now we have two simple equations:
1) 81=100%
2) x=99.7%
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:
81/x=100%/99.7%
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 99.7% of 81

81/x=100/99.7
(81/x)*x=(100/99.7)*x       - we multiply both sides of the equation by x
81=1.0030090270812*x       - we divide both sides of the equation by (1.0030090270812) to get x
81/1.0030090270812=x
80.757=x
x=80.757

now we have:
99.7% of 81=80.757