Question

请问这题怎么解（详细计算过程）？

Answer 1

左边分数去百分号，右边分数删去小数点。

请看下面，点击放大：

Answer 2

(5%-i)/(5%-4%)=(0.7835-0.7917)/(0.7835-0.8219)

(5%-i)/(1%)=-0.0082/-0.0384
100(0.05-i)=82/384=41/192
0.05-i=41/19200
i=5/100-41/19200=(960-41)/19200=919/19200=0.04786458333......≈4.78%

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第三步没看懂，麻烦了

追答

等号前：5%=0.05；/1%=/0.01=100
等号后分子分母同乘-10000

Answer 3

(120000 x(P-15)-500000-778400)x(1-25%)/(120000 XP)x = 1%
(120000 x(P-15)-1278400)x(75%)/(120000 XP)x1 = 1%
(120000 x(P-15)-1278400)x(3/4)/(120000 XP)= 1%
(120000 x(P-15)-1278400)x1/(160000 XP)= 1%
(120000 x(P-15)-1278400)/(160000 XP)= 1%
(75(P-15)-799)/(100便士)=1%
(75(P-15)-799)/P=1
75(P-15)-799=P
75P-75×15-799=P

75P-P-1924=0

74P=1924
P=26

追问

谢谢回答，但…是不是答错题了？