42.7 is what percent of 1220 - 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 1220 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 1220, so we can write it down as 100%=1220.
4. We know, that x% equals 42.7 of the output value, so we can write it down as x%=42.7.
5. Now we have two simple equations:
1) 100%=1220
2) x%=42.7
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%=1220/42.7
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 42.7 is what percent of 1220

100%/x%=1220/42.7
(100/x)*x=(1220/42.7)*x       - we multiply both sides of the equation by x
100=28.571428571429*x       - we divide both sides of the equation by (28.571428571429) to get x
100/28.571428571429=x
3.5=x
x=3.5

now we have:
42.7 is 3.5% of 1220