Answers

2016-07-17T17:20:20+08:00
Let us see:

X-.25(x)=A:
A=is the discounted or decreased by 25%;
or, this becomes;
A+.25(x)= X (original price;
.[.25x/A]= the percent needed to restore the original price ..
             = by multiplying A + A= then it would be the original price
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