我正在尝试从预测结果％中反向预测初始所需值，却找不到正确的公式（假设从输入到结果的值下降是相同的）。
以下是数据示例：
A B C D E F G
Input Result % New Input New Result New % Required %
2000 700 35 1857.05 557.05 30 30
A = Raw data
B = Raw data
C = B / A
D = (A - B) * 1.4285 'This is the formula i need help with, i want this formula to calculate the required new input to receive result G but can only get result G currently by manually tweaking the number in D formula or causing a circular reference
E = D - (A - B)
F = E / D
G = User input
我希望用户在G中键入所需的百分比，然后将“新输入”更改为在F中产生该百分比所需的数字。
希望这是有道理的，谢谢。