Frank had a pretest score of 6, what must his posttest score be for his percent of increase to be 50 percent?
Was the pretest score 6% (6 out of 100)?
No my teacher said he thought it was like 6 out of 20
50% * 6 = 3
6 + 3 = 9
Ohhhh ok I get it now.....so if you had a percent of decrease problem you would to the same thing but divide right?
No, you'd still multiply, but subtract 3 from 6. A decrease of 50% would be 3.
To find Frank's posttest score, we need to calculate the percent increase from his pretest score.
Let's set up the equation:
Percent increase = (Posttest score - Pretest score) / Pretest score * 100%
We are given that the percent increase is 50 percent, and the Pretest score is 6. Let's substitute these values into the equation:
50% = (Posttest score - 6) / 6 * 100%
To solve for the Posttest score, we can rearrange the equation:
(Posttest score - 6) / 6 = 50% / 100%
Simplifying the right side of the equation:
(Posttest score - 6) / 6 = 0.5
Now, we can isolate the Posttest score by multiplying both sides of the equation by 6:
Posttest score - 6 = 0.5 * 6
Posttest score - 6 = 3
Finally, we can solve for the Posttest score by adding 6 to both sides of the equation:
Posttest score = 3 + 6
Posttest score = 9
So, Frank's posttest score must be 9 for his percent of increase to be 50 percent.