Question

The price of an article is reduced by 20%. What
is the ratio of:
(i) new price to old price.
(ii) change in price to old price.​

Answer 1

Answer:

Price after p% increase =(100+p)% of x

=  

100

(100+p)x

​  

 

New price after p% decrease

=(100−p)%of[  

100

(100+p)x

​  

]

=  

100

(100−p)

​  

×  

100

(100+p)

​  

×x

=  

100×100

(100−p)(100+p)

​  

×x=1

​  

 

Or

x=  

(100−p)(100+p)

100×100

=  

10000−p  

2

Hence, Option C is the correct answer.

Step-by-step explanation:

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