If the length of a rectangle is reduced by 15% and breadth is increased by 10%, what is the percentage change in the area of the rectangle?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 6.5% decrement.
If the length of a rectangle is reduced by 15% and breadth is increased by 10%.
Percentage change = x + y + xy/100
So, the percentage change in the area of the rectangle
= -15 + 10 -15 × 10/100
= -5 - 1.5
= -6.5%
6.5% decrement