ABSTRACT The purpose of the study was to obtain the best ratio of crystal guava pulp and purple sweet potato pulp in making fruit leather according to SNI 3747‒2008 on fruit jam. The treatments of fruit leather in this study were the ratio of crystal guava fruit pulp and purple sweet potato pulp including JU1 (90:10), JU2 (80:20), JU3 (70:30), JU4 (60:40), and JU5 (50:50). The parameters obs…