I would like to know 15 is what % of 39

2. We assume, that x is the value we are looking for.

3. If 39 is 100%, so we can write it down as 39=100%.

4. We know, that x is 15% of the output value, so we can write it down as x=15%.

5. Now we have two simple equations:

1) 39=100%

2) x=15%

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:

39/x=100%/15%

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 15% of 39

39/x=100/15

(39/x) * x = (100/15) * x - we multiply both sides of the equation by x

39=6.66666666667*x - we divide both sides of the equation by (6.66666666667) to get x

39/6.66666666667=x

5.85=x

x=5.85

now we have:

15% of 39=5.85

Setup

remember is means =, and of means *

Writing across the words

15 = x * 39

15/39 = x

x = 0.3846 = 38.46%