right decimal percentage: If i take a test with 10 question and i got 7 of then right the decimal would be 0.7 in percent it would be 70%. That i your answer. (this is how much you got right.)
wrong decimal percentage: the wrong decimal percentage would be 0.3 because divide 7 by 10 and you get 0.7 and out of 10 would be 0.3, there is your answer.