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what is the formula to calculate an effective discount rate of Discount Series? For EX, If Price of Product A is $X and Discount Series is given like 10%,20%,30%,5%,2%. How can we calculate effective discount of this discount series?

https://answers.yahoo.com/question/index?qid=20110703053015AANbTBg

I found something here, but searching for a generalized formula for N number of Discount Series. Thank you

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$$\displaystyle 1-\prod_i(1-d_i)$$ should give you the answer, with the discounts treated as fractions, so for example $10\%$ being $0.1$

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  • $\begingroup$ This is not really the issue, but is 0.1 a fraction? (Is 1.0 also a fraction? It can be written as the ratio of numerator and nominator.) $\endgroup$
    – Giskard
    Sep 13 '16 at 11:04
  • $\begingroup$ @denesp To me $0.1$ is a decimal fraction equivalent to $10\%$ and $\frac1{10}$. Whether $1$ or $100\%$ or $\frac11$ is too hardly matters, as that discount means that the product is free $\endgroup$
    – Henry
    Sep 13 '16 at 15:46

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