73 is what 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 100% equals 81, so we can write it down as 100%=81.
4. We know, that x% equals 73 of the output value, so we can write it down as x%=73.
5. Now we have two simple equations:
1) 100%=81
2) x%=73
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%=81/73
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 73 is what percent of 81

100%/x%=81/73
(100/x)*x=(81/73)*x       - we multiply both sides of the equation by x
100=1.1095890410959*x       - we divide both sides of the equation by (1.1095890410959) to get x
100/1.1095890410959=x
90.123456790123=x
x=90.123456790123

now we have:
73 is 90.123456790123% of 81