33 to 45 is a 36.36% increase.
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The original mark up was 50%.
what you do is you divide 100 by the amount the test was out of then times your answer by your mark
A 100% mark up doubles the selling price.
-100
well there are a lot of ways to calculate percentage. But i just like to do it like this. Just do 33 times 7 which equals 231. Move the decimal over and you end up with 23.1 So 23.1 out of 33 is 70 percent or in other words, a B-