What is 87.8 percent of 421.44 - 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 421.44 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 421.44 is 100%, so we can write it down as 421.44=100%.
4. We know, that x is 87.8% of the output value, so we can write it down as x=87.8%.
5. Now we have two simple equations:
1) 421.44=100%
2) x=87.8%
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:
421.44/x=100%/87.8%
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 87.8% of 421.44

421.44/x=100/87.8
(421.44/x)*x=(100/87.8)*x       - we multiply both sides of the equation by x
421.44=1.1389521640091*x       - we divide both sides of the equation by (1.1389521640091) to get x
421.44/1.1389521640091=x
370.02432=x
x=370.02432

now we have:
87.8% of 421.44=370.02432