However, it is not easy for students to figure out how to solve various proportional problems. Students often use additive reasoning in solving tasks where proportional reasoning is required (Singh, 2000), or non-constructive strategies without reasoning such as avoiding, visual or additive approaches and pattern building (Lamon, 2007). These difficulties result from the lack of profound understanding of multiplicative relationship between quantities, which is the foundation of proportional reasoning. Given this, it seems important to explore the relationship between multiplicative thinking and proportional reasoning.