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

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.

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step-by-step explanation: