Former price

The price of an article is cut by 10% to restore it to its former value. By what percent the new price must be increased?

Correct answer:

p =  11.1111 %

Step-by-step explanation:

(110/100) (1+p/100)=1  0.9p=10  p=0.910=11.11111111  p=910011.111111=11.1111%

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