Instead of increasing a number successively by 20 percent and 30 percent, it is decreased by 22 percent. Resultant value is what percentage of the required correct value?
Answer & explanation
Correct answer: option 2
Let initial value = 100x
Required correct value = 100x × \(\frac{120}{100}\) × \(\frac{120}{100}\)
= 156x
Wrong value = 100x × \(\frac{78}{100}\) = 78x
Required Percentage = \(\frac{78x}{156x}\) × 100 = 50%