एक संख्या को पहले 20% बढ़ाया जाता है और फिर 20% घटाया जाता है। शुद्ध परिवर्तन है
A4% कमी
B4% वृद्धि
Cकोई परिवर्तन नहीं
D2% कमी
Answer & Solution
Correct answer: A. 4% कमी
**लगातार प्रतिशत परिवर्तन:** a + b + ab/100 = 20 + (-20) +
(20)(-20)/100 = -4%।
समान रूप से, 1.20 x 0.80 = 0.96 = 4% कमी।
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