40 is what percent of 1542 - 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 1542 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 1542, so we can write it down as 100%=1542.
4. We know, that x% equals 40 of the output value, so we can write it down as x%=40.
5. Now we have two simple equations:
1) 100%=1542
2) x%=40
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%=1542/40
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 40 is what percent of 1542

100%/x%=1542/40
(100/x)*x=(1542/40)*x       - we multiply both sides of the equation by x
100=38.55*x       - we divide both sides of the equation by (38.55) to get x
100/38.55=x
2.5940337224384=x
x=2.5940337224384

now we have:
40 is 2.5940337224384% of 1542