Saniatun Nurhasanah, S.E.I The purpose of this research is to estimate the effect of Capital Aduaquacy ratio (CAR), Financing to Deposit (FDR), and Operating Cost Ratio (BOPO) either patially or simultaneously to Iislamic banking Return on Equity. This research will describe the return on equity that inflenced by some factors. Those are Capital Aduaquacy Ratio (CAR), Financing to Deposit (FDR)…