What is 0.21 percent of 78 - 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 78 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 78 is 100%, so we can write it down as 78=100%.
4. We know, that x is 0.21% of the output value, so we can write it down as x=0.21%.
5. Now we have two simple equations:
1) 78=100%
2) x=0.21%
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:
78/x=100%/0.21%
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 0.21% of 78

78/x=100/0.21
(78/x)*x=(100/0.21)*x       - we multiply both sides of the equation by x
78=476.19047619048*x       - we divide both sides of the equation by (476.19047619048) to get x
78/476.19047619048=x
0.1638=x
x=0.1638

now we have:
0.21% of 78=0.1638