PriariE.; WulandariA. Ratio Analysis to Measuring Financial Performance of PT. Indosat Tbk. Listed in IDX (Period 2015-2018). IJIEEB International Journal of Integrated Education, Engineering and Business eISSN 2615-1596 pISSN 2615-2312, v. 2, n. 2, p. 105-114, 14 Sep. 2019.