What is 10 percent of 640 - step by step solution

Simple and best practice solution for 10% of 640. 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 640 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 640 is 100%, so we can write it down as 640=100%.
4. We know, that x is 10% of the output value, so we can write it down as x=10%.
5. Now we have two simple equations:
1) 640=100%
2) x=10%
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:
640/x=100%/10%
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 10% of 640

640/x=100/10
(640/x)*x=(100/10)*x       - we multiply both sides of the equation by x
640=10*x       - we divide both sides of the equation by (10) to get x
640/10=x
64=x
x=64

now we have:
10% of 640=64

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