alleryایک نمبر کو پہلے 20% بڑھایا جاتا ہے اور پھر 20% کی کمی ہوتی ہے۔ خالص تبدیلی ہے۔
A4% کمی
B4% اضافہ
Cکوئی تبدیلی نہیں۔
D2% کمی
Answer & Solution
Correct answer: A. 4% کمی
**مسلسل فیصد تبدیلی:** a + b + ab/100 = 20 + (-20) + (20)(-20)/100 = -4%۔
مساوی طور پر، 1.20 x 0.80 = 0.96 = 4% کمی۔
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