What percent is 28 of 70?

The answer is 40%

You assume that the number 70 is 100% because it's the output value of the task, X is what you will be looking for

100%=70 So we know that x% equals 28 of the output value, so x%=28

Which gives you two simple equations

1. 100%=70

2. x%=28

Where both sides of them have the same unites, both right sides have the same unites, so we can do something like 100%/x%=70/28 and then you solve the equation to get what you are looking for

(100/x) * x = (70/28) * x - you multiply both sides by X

100=2.5*x - you divide both sides of the equations by (2.5) to get x

100/2.5=x

40=x so X equals 40

To find the percentage of 28 from 70:

28/70=0.4

0.4=40%