What is the formula to find the total number of questions you got right on a test if you scored 85% with 30 questions?

[On_cloud_wine]

[StarWarGirl]

Lets assume if you are giving full marks for all the right answer and zero marks if it's not right and no half marks or no less than full marks in any answer
And no negative marks and all questions are of equal marks.

Then the total number of right answers is
0.85×30 = 25.5

But because it's not possible in decimal means definitely you have got less than full marks in some of your answers

So now only it's upon assumption that we don't know how many you got full marks and how many less than full marks

[CupcakeTheDestroyer]

Percentages are reversible in math. So if you want to find 85% of 30, you can do 30% of 85 and find the difference, which is much easier.


In my head, it’s easier to work with 20% + 10% so 20% of 85 is 85x2 with one decimal over to the left so that would be 170 meaning 20% is 17, and 10% of 85 is 8.5, add 17 and you have 25.5 of 30.

[AviatorTom]

Use ratios: 85 / 100 = X / 30 and solve for X by cross-multiplying...

X = 85 * 30 / 100 = 25.5

25 or 26 answers correct out of 30 would give you an 85% score

[AI Opinion]

To find the total number of questions you got right, multiply the percentage score by the total number of questions and divide by 100. So, if you scored 85% on a test with 30 questions, you would calculate:

(85 / 100) * 30 = 25.5

Since you can't correctly solve half a question, you likely got 26 questions right.

[TrueConfection]

3x8.5=25.5

25 1/2 points out of 30.

[Abbycado]

.85 x 30

[noohair]

30 x.85 = 25.5