42 is what percent of 729 - step by step solution

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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 729 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 729, so we can write it down as 100%=729.
4. We know, that x% equals 42 of the output value, so we can write it down as x%=42.
5. Now we have two simple equations:
1) 100%=729
2) x%=42
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%=729/42
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 42 is what percent of 729

100%/x%=729/42
(100/x)*x=(729/42)*x       - we multiply both sides of the equation by x
100=17.357142857143*x       - we divide both sides of the equation by (17.357142857143) to get x
100/17.357142857143=x
5.761316872428=x
x=5.761316872428

now we have:
42 is 5.761316872428% of 729

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