Question

E8 The price of a book was raised by x%. Then it was slashed by 20% to bring it to the
earlier level. Find the value of x.​

Answer 1

|| ✰✰ ANSWER ✰✰ ||

Lets Assume That, original Price of book was Rs.100.

Now , It was Raised by x% .

So,

→ New price = [100*(100+x)/100] = Rs. (100+x).

Now , Given That, when we Slashed New price by 20% we get our original price .

So,

→ [(100+x)*80]/100 = 100

→ (100+x)*80 = 100*100

→ 8000 + 80x = 10000

→ 80x = 10000-8000

→ 80x = 2000

→ x = (2000/80)

→ x = 25% . (Ans).

Hence, Value of X was 25%.