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જો કોઈ મૂલ્ય 500 થી ઘટીને 400 થાય છે, તો ટકાવારી ઘટાડો કેટલો છે?

A20%
B25%
C15%
D10%
Answer & Solution
Correct answer: A. 20%
ઘટાડો = 500 - 400 = 100. ટકાવારી ઘટાડો = (100 / 500) * 100 = 20%.
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