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ഒരു സംഖ്യയെ 5 കൊണ്ട് ഹരിക്കുന്നതിനു പകരം 4 കൊണ്ട് ഹരിച്ചു എങ്കിൽ പിശക് ശതമാനം എത്ര ?

A20%

B25%

C10%

D15%

Answer:

B. 25%

Read Explanation:

സംഖ്യ X ആയാൽ യഥാർത്ഥ ക്രിയ = X/5 തെറ്റായി ചെയ്തത് = X/4 പിശക് = X/4 - X/5 = X/20 പിശക് ശതമാനം = [(X/20)/(X/5)] ×100 = X/20 × 5/X × 100 = 25%


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