月還款額168000 15 (180個月):
如果按基準利率計算:
[168000 * 0.495% * (1+0.495%) 180]/[(1+0.495%) 180-1] =
如果按優惠利率計算:
[168000 * 0.3465% * (1+0.3465%) 180]/[(1+0.3465%) 180-1
說明:180是180的冪。