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This study aimed to describe the proportional reasoning of prospective teachers and their predictions about students' answers. Subjects were 4 prospective teachers 7 th semester Department of Mathematics Education, Muhammadiyah University of Purworejo. Proportional reasoning task used to obtain research data. Subjects were asked to explain their reasoning and write predictions of student completion. Data was taken on October 15 th , 2014. Interviews were conducted after the subjects completeddoi:10.11591/edulearn.v9i3.1693 fatcat:yvjwexqbefgenlsapviujurmvu