The required portion of the ACT is divided into four multiple choice subject tests: English, mathematics, reading, and science reasoning. Subject test scores range from 1 to 36; all scores are integers. The English, mathematics, and reading tests also have subscores ranging from 1 to 18. (The subject score is not the sum of the subscores.) The "composite score" is the average of all four tests. In addition, students taking the writing test receive a writing score ranging from 2 to 12, a "combined English/writing score" ranging from 1 to 36 (based on the writing score and English score), and one to four comments on the essay from the essay scorers. The writing score does not affect the composite score. On the ACT, each question correctly answered is worth one raw point. Unlike the SAT, there is no penalty for marking incorrect answers on the multiple-choice part of the test. To improve the result, students can retake the test: 55% of students who retake the ACT improve their scores, 22% score the same, and 23% see their scores decrease.