We assume, that the number 150 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 150, so we can write it down as 100%=150. 4. We know, that x% equals 75 of the output value, so we can write it down as x%=75. 5. Now we have two simple equations: 1) 100%=150 2) x%=75 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%=150/75 6. Now we just have to solve the simple equation, and we will get the solution we are looking for.
7. Solution for 75 is what percent of 150
100%/x%=150/75 (100/x)x=(150/75)x - we multiply both sides of the equation by x 100=2*x - we divide both sides of the equation by (2) to get x 100/2=x 50=x x=50
