Question

If the length of a rectangle is increased by 20% and the breadth of the rectangle is decreased by 10%, how much percent is less or greater than the value of the new area of the rectangle in comparison with the value of the older area?

• A. 4% less
• B. 8% more
• C. 12% less
• D. 16% more

Answer 1

Answer:

B. 8% more

By using successive formula for percentage change = (x + y + xy/100)% x = 20 and y = –10 Percentage change in area = (20 – 10 – (20 × 10)/100)% Percentage change in area is 8%