Question

The cost of a fan increases in the first year by 10%, in
the second year by 20% and finally by 25% during
the subsquent year. If the present cost of fan is Rs.
2,000, find the cost of the fan at the end of the third
year.​

Answer 1

Step-by-step explanation:

Let the original price be x

Then increased to 20% ⟹ x+20/100=6/5x

Then decreased to 30% ⟹6/5x-30/100x6/5x=21/25x

So the net decrease is x−21/25x=4/25x

The percentage change is 4/25x/x×100=16%