30万5年期贷款,月供5700,利率是5.27%,如下图。
利率是5.2805%,计算过程如下:
假设月利率为R,则:
300000/(P/A,R,60)=5700
(P/A,R,60)=300000/5700=52.63157895
当R=0.45%时,(P/A,0.45%,60)=52.47955537
当R=0.44%时,(P/A,0.44%,60)=52.63218104
使用插值法计算月利率R=(0.45%-0.44%)/((52.47955537-52.63218104)/(52.63157895-52.63218104))+0.44%=0.44003945%
年利率=0.44003945%*12=5.2805%