উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।
ব্যাখ্যা ও সঠিক সমাধান
উত্তর:
16.66%
Let the original price of paper be Tk.100.
The price of paper is increased by 20%.
Increased price of paper = 100 + (20% of 100) = 100 + 20 = Tk. 120.
Increase in price = 120 - 100 = Tk.20
Tea of cost Tk.20 is to decreased out of the increased cost of Tk.120.
Percentage decrease = (20/120) x 100 = 100/6 = 16 2/3 %. = 16.66 %