What is the total calculated discount percentage of 50 10 10 5 5 off?

Answer 1

I presume you are asking for the equivalent single percentage discount when first 50% is applied, then 10%, then 10%, then 5% then 5%, ie 95% of 95% of 90% of 90% of 50% of the original price is being paid, so the total discount is 100% - this:

95% of 95% of 90% of 90% of 50% = 95/100 x 95/100 x 90/100 x 90/100 x 50/100 = 3655125/10000000 = 36.55125 % ≈ 36.55 %

So the discount is approx 100% - 36.55% = 63.45 %