If the price of an item increases from Tk. 25 to Tk. 28, the old price is what % of the new price?

A 10%

B 20%

C 89.29%

D 100%

Correct Answer: Option C

When new price is 28 tk, old price is 25 tk

When new price is 100 tk, old price is 25*100/28 tk

= 89.29 tk or 89.29%