“…Many previous studies (Stafford et al, 2015;Toluk-Ucar and Bozkus, 2018;Arican, 2019a;Memiş and Yanik, 2019;Weiland et al, 2020;Ozturk et al, 2021) have indicated that there are many and varied difficulties facing teachers and students in the field of proportional reasoning and related topics, and there are errors made by teachers and students in this field, and the most common errors that are made by students and teachers are as follows: Failure to distinguish between proportional and non-proportional situations, use of the additive comparison in proportional situations, and use of the multiplicative comparison in non-proportional situations. Some of these studies (Ojose, 2015;Glover, 2016;Yeong and Martinez, 2016;Andini and Jupri, 2017;Soyak and Isiksal, 2017;Nasir, 2018;Çalışıcı, 2018;Çelen, 2018) also showed that students and teachers have weaknesses in proportional reasoning due to how subjects related to proportional reasoning are taught, how topics related to proportional reasoning are presented in mathematics textbooks, and non-variety in proportional problems in real-life contexts.…”