Penggunaan Batang Persen untuk Menyelesaikan Permasalahan Tentang Persen

Abstract

This study aims to figure out how percentage bar supports students in solving percentages problems: 1) students are able to compute the part of a whole while the percentage is given; 2) students are able to compute a whole if its part and its percentage is given. The subject of this research is 22 fifth grade students. The study is conducted when students only have pre-requisite knowledge of fractions.According to the aims, we use Design Research as a method by developing a set of instructional activities which is exploring students’ knowledge of percentages. Besides, we apply some contextual problems – road repair and discount problems – based on Realistic Mathematics Education (RME) approach. From those activities, students employ percentage bar to solve percentage problems. The collected data shows that the percentage bar can support students in solving percentage problems. However, some of them still have much struggle in solving discount problems.