Question

the price of an article is cut by 31% to restore it's original value the new price must be increased by

Answer 1

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Answer 2

Answer:

The new price must be increased by 11  1/9%

Step-by-step explanation:

Given : The price of an article is cut by 31% to restore it's original value.

To find : The new price must be increased by ?

Solution :

Let a number be 100

Its decreased by 10%

i.e,  100- (10/100×100)

⇒  100-10= 90

Let the increase % be x

90+(x/100×90)= 100

⇒90+ 90x/100

⇒90x/100= 100-90

⇒x= 10×100/90

⇒x= 100/9 %

or 11 whole 1 by 9 % =11 1/9%