100*4/22 = 18.1818... (recurring) % wrong.
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8 wrong i.e. 32 right 10% of 40 is 4 80% = 8 x 4 = 32 40 - 32 = 8
Missing 4 out of 20 means you missed 20%.
4% wrong
o% information incomplete
To find the percentage, find the number of correct answers and divide by the total number of questions given. In this case it is (10-4)/10, or 60 percent.