1/2percent commitment 在计算中为何是1/12？
问题如下图：
选项：
A. 
B. 
C. 
解释：
NO.PZ2016021705000067 想问一下c项哪里表述rate是inclusive的了？谢谢老师
NO.PZ2016021705000067 Banker’s acceptance. Commercipaper. B is correct. 1. Line of cret Line cost=Interest+Commitment FeeNet Procee12Line\ cost = \frac{Interest+Commitment\ Fee}{Net\ Procee\times12Line cost=Net Proceenterest+Commitment Fee×12 (0.072×1,000,000×112)+(0.05×1,000,000×112)1,000,000×12\frac{(0.072\times1,000,000\times\frac{1}{12})+(0.05\times1,000,000\times\frac{1}{12})}{1,000,000}\times121,000,000(0.072×1,000,000×121)+(0.05×1,000,000×121)×12 =6,000+416.671,000,000×12=\frac{6,000+416.67}{1,000,000}\times12=1,000,0006,000+416.67×12 =0.077 or 7.7%=0.077\ or\ 7.7\%=0.077 or 7.7% 2. Banker’s acceptanBanker′s acceptance cost=InterestNet Procee12Banker's\ acceptance\ cost=\frac{Interest}{Net\ Procee\times12Banker′s acceptance cost=Net Proceenterest×12 =(0.071×1,000,000×112)1,000,000−(0.071×1,000,000×112)×12=\frac{(0.071\times1,000,000\times\frac{1}{12})}{1,000,000-(0.071\times1,000,000\times\frac{1}{12})}\times12=1,000,000−(0.071×1,000,000×121)(0.071×1,000,000×121)×12 =5916.67994,083.33×12=\frac{5916.67}{994,083.33}\times12=994,083.335916.67×12 =0.0714 or 7.14%=0.0714\ or\ 7.14\%=0.0714 or 7.14% 3. Commercipaper Commercial paper cost=Interest+aler′s commission+Backup costsNet Procee12Commercial\ paper\ cost=\frac{Interest+aler's\ commission+Backup\ costs}{Net\ Procee\times12Commercial paper cost=Net Proceenterest+aler′s commission+Backup costs×12 =(0.069×1,000,000×112)+(0.0025×1,000,000×112)+(0.003333×1,000,000×112)1,000,000−(0.069×1,000,000×112)×12=\frac{(0.069\times1,000,000\times\frac{1}{12})+(0.0025\times1,000,000\times\frac{1}{12})+(0.003333\times1,000,000\times\frac{1}{12})}{1,000,000-(0.069\times1,000,000\times\frac{1}{12})}\times12=1,000,000−(0.069×1,000,000×121)(0.069×1,000,000×121)+(0.0025×1,000,000×121)+(0.003333×1,000,000×121)×12 =5,750+208.33+277.781,000,000−5,750×12=\frac{5,750+208.33+277.78}{1,000,000-5,750}\times12=1,000,000−5,7505,750+208.33+277.78×12 =0.0753 or 7.53%=0.0753\ or\ 7.53\%=0.0753 or 7.53% 为什么第一个解答里面分母没有减去interest 呢
Banker’s acceptance. Commercipaper. B is correct. 1. Line of cret Line cost=Interest+Commitment FeeNet Procee12Line\ cost = \frac{Interest+Commitment\ Fee}{Net\ Procee\times12Line cost=Net Proceenterest+Commitment Fee×12 (0.072×1,000,000×112)+(0.05×1,000,000×112)1,000,000×12\frac{(0.072\times1,000,000\times\frac{1}{12})+(0.05\times1,000,000\times\frac{1}{12})}{1,000,000}\times121,000,000(0.072×1,000,000×121)+(0.05×1,000,000×121)×12 =6,000+416.671,000,000×12=\frac{6,000+416.67}{1,000,000}\times12=1,000,0006,000+416.67×12 =0.077 or 7.7%=0.077\ or\ 7.7\%=0.077 or 7.7% 2. Banker’s acceptanBanker′s acceptance cost=InterestNet Procee12Banker's\ acceptance\ cost=\frac{Interest}{Net\ Procee\times12Banker′s acceptance cost=Net Proceenterest×12 =(0.071×1,000,000×112)1,000,000−(0.071×1,000,000×112)×12=\frac{(0.071\times1,000,000\times\frac{1}{12})}{1,000,000-(0.071\times1,000,000\times\frac{1}{12})}\times12=1,000,000−(0.071×1,000,000×121)(0.071×1,000,000×121)×12 =5916.67994,083.33×12=\frac{5916.67}{994,083.33}\times12=994,083.335916.67×12 =0.0714 or 7.14%=0.0714\ or\ 7.14\%=0.0714 or 7.14% 3. Commercipaper Commercial paper cost=Interest+aler′s commission+Backup costsNet Procee12Commercial\ paper\ cost=\frac{Interest+aler's\ commission+Backup\ costs}{Net\ Procee\times12Commercial paper cost=Net Proceenterest+aler′s commission+Backup costs×12 =(0.069×1,000,000×112)+(0.0025×1,000,000×112)+(0.003333×1,000,000×112)1,000,000−(0.069×1,000,000×112)×12=\frac{(0.069\times1,000,000\times\frac{1}{12})+(0.0025\times1,000,000\times\frac{1}{12})+(0.003333\times1,000,000\times\frac{1}{12})}{1,000,000-(0.069\times1,000,000\times\frac{1}{12})}\times12=1,000,000−(0.069×1,000,000×121)(0.069×1,000,000×121)+(0.0025×1,000,000×121)+(0.003333×1,000,000×121)×12 =5,750+208.33+277.781,000,000−5,750×12=\frac{5,750+208.33+277.78}{1,000,000-5,750}\times12=1,000,000−5,7505,750+208.33+277.78×12 =0.0753 or 7.53%=0.0753\ or\ 7.53\%=0.0753 or 7.53% 为什么佣金要除以12，不是按次收费的么
老师，这题看不懂答案，能不能帮忙详细讲解一下，谢谢！
我不知道为什么，我在用计算器算6.9%+0.25%的时候，如果我先按6.9，再按一个%，再按一个+，再按0.25，再按一个%，界面就会显示0.000173，然后按=，就会变成0.069173，但是答案应该是7.15%。是我按的有问题吗
