1. We assume, that the number 128 is 100% - because it's the output value of the task. <span>2. We assume, that x is the value we are looking for. </span> <span>3. If 128 is 100%, so we can write it down as 128=100%. </span> <span>4. We know, that x is 51% of the output value, so we can write it down as x=51%. </span> 5. Now we have two simple equations: 1) 128=100% 2) x=51% 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: 128/x=100%/51% 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 51% of 128
128/x=100/51 <span>(128/x)*x=(100/51)*x - </span>we multiply both sides of the equation by x <span>128=1.96078431373*x - </span>we divide both sides of the equation by (1.96078431373) to get x <span>128/1.96078431373=x </span> <span>65.28=x </span> x=65.28
<span>now we have: </span> <span>51% of 128=65.28</span>