SOLUTION: If 2 succesive discounts20% and 10% are given. Then overall one discount is what??

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Question 1004835: If 2 succesive discounts20% and 10% are given. Then overall one discount is what??
Answer by josgarithmetic(39799) About Me  (Show Source):
You can put this solution on YOUR website!
Depends on how you mean to apply them.
p price
p-0.2p first discounted price
(p-0.2p)-(p-0.2p)*(0.1) second discounted price
-
p-0.2p-0.1p%2B0.1%2A0.2p
p%281-0.2-0.1%2B0.1%2A0.2%29
p%281-0.3%2B0.02%29
%280.7%2B0.02%29p
%280.72%29P-----Second Price

How this differs from 1.00 of the price originally,
0.28 of the price p.
This is 28% discount altogether.