Final price

The bookshop reduced the book's original price of CZK 850 by 20%. It was raised by 20% of the new price in a week. Find the final price of the book. How much percent of the original price of the book is the final price?

Correct answer:

c =  816 kc
p =  96 %

Step-by-step explanation:

a=850 kc b=a (120/100)=850 (120/100)=680 kc c=b (1+20/100)=680 (1+20/100)=816 kc
p=100 c/a=100 816/850=96%

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