If the price of an article is reduced by 25% and its daily sale is increased by 30%, then the net percent effect on daily sale is

Correct option is D

Given:
Price change (a) = -25%
Sale change (b) = +30%
Formula Used:
Net effect = $$a + b + \frac{a × b}{100}$$​​
Solution:
Substitute the values into the successive percentage formula.
Net effect = $$-25 + 30 + \frac{-25 × 30}{100}$$​​
​$$= 5 - \frac{750}{100}$$​​
= 5 - 7.5 = -2.5%
A negative sign indicates a decrease.
Therefore, there is a 2.5% decrease in the daily sale.
Final Answer
So the correct answer is (d)