In the last week of a month, a car dealer sold 12 cars. A new sales promotion came out in the first week of the next month and he sold 19 cars during that week. What was the percent increase in sales from the last week of the previous month to the first week of the next month?

এক ব্যবসায়ী একটি পণ্যের মূল্য ২৫% বাড়ালো, অতঃপর বর্ধিত মূল্য থেকে ২৫% কমালো। সর্বশেষ মূল্য সর্বপ্রথম মূল্যের তুলনায়-

একটি বৃত্তের ব্যাসার্ধ ১০% বৃদ্ধি পেলে, এর ক্ষেত্রফল শতকরা কত বৃদ্ধি পাবে?

If the side of a square is increased by 10%, by what percent will the area be increased?

What is the percentage increase in the area of a rectangle, if each of its side is increased by 25%?

Mr. A multiplies a number by 3 instead of dividing by 3. Resultant number is what percentage of the correct value?

What is the percentage increase in the area of a rectangle if each of its sides is increased 20%.