Price of a product is 48 units. After two successive cuts by same percentage, price of the product becomes 20.25. What is the discount percentage?
I assumed the percentage to be x and multiplied x by x/100 and x/100. Didn't get the right answer. The answer x is 10. I want to know how to get to the answer.
$$48(1-x)(1-x)=20.25$$
Thus
$$x=1-\sqrt{\frac{20.25}{48}}\approx 0.35048=35.048 \%$$