如何从结果值中获取原始值

Question

我遇到了以下问题，并从中获得了结果如何从答案中取回原始值。

count = 5000;  rate = 5%
deduction_percentage  =  5 / 100 (rate / 100)
deduction_percentage = 0.05;
weight deduction = 5000 * 0.05 (count * deduction_percentage) 
weight_dedcution = 250
total = 5000 - 250 (count - weight_deduction)
total = 4750 

使用此答案4750并率5％如何将原始计数设为5000。

Answer 1

var count = 5000;  var rate = 5; // 5%
var deduction_percentage  =  5 / 100;  //(rate / 100)
deduction_percentage = 0.05;
var weight_deduction = 5000 * 0.05;  //(count * deduction_percentage) 
weight_dedcution = 250;
var total = 5000 - 250; // (count - weight_deduction)
total = 4750;

// below line to get back original count.
var original_count = total * 100 / (100 - rate);
console.log(original_count);