A number is first increased by 40% and then decreased by 25% again increased by 15% and then decreased by 20%. What is the net increase/decrease percent in the number?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 3.4% decrease.
Let the number be y
⇒ y × 7/5 × 3/4 × 23/20 × 4/5
⇒ y × 483/500
⇒ 0.966y
Here,
⇒ 0.966y < y
Decrease percent in number = (y - 0.996y)/100 = 3.4%
Thus, the net decrease percent in the number is 3.4%