alleryমূল্য 20% হ্রাস করার পর, পূর্বের মূল্য ফিরিয়ে আনতে শতকরা কত বৃদ্ধি করতে হবে?
A20%
B15%
C25%
D30%
Answer & Solution
Correct answer: C. 25%
হ্রাসের পর কেবল 0.8 অবশিষ্ট থাকে, তাই 0.2/0.8 = 25 শতাংশ বৃদ্ধি প্রয়োজন।
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