0.77 is what percent of 21.9 - 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 21.9 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 21.9, so we can write it down as 100%=21.9.
4. We know, that x% equals 0.77 of the output value, so we can write it down as x%=0.77.
5. Now we have two simple equations:
1) 100%=21.9
2) x%=0.77
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%=21.9/0.77
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 0.77 is what percent of 21.9

100%/x%=21.9/0.77
(100/x)*x=(21.9/0.77)*x       - we multiply both sides of the equation by x
100=28.441558441558*x       - we divide both sides of the equation by (28.441558441558) to get x
100/28.441558441558=x
3.5159817351598=x
x=3.5159817351598

now we have:
0.77 is 3.5159817351598% of 21.9