Your CHI exam score report states two separate things: the overall scaled score, and how well you did in specific parts of the test. There is no relationship between the percentages reported for the parts of the test (subdomains) and the overall scaled score. We report the percentage correct for 3 subdomains: consecutive interpreting, simultaneous interpreting, and sight translation/translation. The percentage correct for any part of the test (subdomain, e.g. consecutive interpreting) is computed as the portion of the points that you earned relative to the number of points it is possible to earn in that part. For example, if the maximum number of points that it is possible to earn in a part of the test is 72 and you earned 51 points, the percentage on your score report would be 71%.
Your total score is not the average of your performance in all subdomains. Please recognize that since the examination is scored on a totality, the percentages reported for subdomains are intended only as a guide. In order to improve your score if you failed an exam, you need to practice and improve all modes of interpreting.