Question

Dwayne answered 80% of the questions on a quiz correctly. If he answered 40 questions correctly what was the total number of questions on Dwayne’s quiz

Answer 1

Answer:

50

Step-by-step explanation:

We have that he answered 80% correct and that 80% represents 40 questions:

Questions     Percentage

     40         ⇔      80%

We need to known the total number of questions on the quiz, that means we are looking for the 100% of questions. I will call the total quantity of questions x, and we update the last table:

Questions     Percentage

     40         ⇔      80%

      x          ⇔      100%

To find x, we solve this problem using rule of three: multiply the cross quantities on the table (40 and 100%) and divide by the remaining amount (80%), we get the following:

x = (40)(100%) / 80%

x = 4000/80

x = 50

the total number of questions on Dwayne’s quiz is 50.

Answer 2

Hello! 
Dwayne would've had 50 total questions on the test if he got an 80% with 40 correct answers. (40/50 = .8, .8 x 100 = 80)

Hope this helped and good luck!