What is 25 percent of 80 - step by step solution

Simple and best practice solution for 25% of 80. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

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To get the solution, we are looking for, we need to point out what we know.

1. We assume, that the number 80 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 80 is 100%, so we can write it down as 80=100%.
4. We know, that x is 25% of the output value, so we can write it down as x=25%.
5. Now we have two simple equations:
1) 80=100%
2) x=25%
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:
80/x=100%/25%
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 25% of 80

80/x=100/25
(80/x)*x=(100/25)*x       - we multiply both sides of the equation by x
80=4*x       - we divide both sides of the equation by (4) to get x
80/4=x
20=x
x=20

now we have:
25% of 80=20

 

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