Percentage - 4

Описание к видео Percentage - 4

If a value is increased by n/d then to get back the same number P. we have to decrease the resultant value by n/(d+n)
If a value is decreased by n/d then to get back the same number P. we have to increase the resultant value by n/(d-n)
Age of Ravi is 20 year. If the Shyam's age is 25% greater than that of Ravi then how much per cent Ravi's age is less than Shyam's age ?
If the price of petrol falls down by 20% by how much per cent must a person increase its consumption, so as not to decrease the expenditure on his item ?

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