Percentage Part 2 :
Rule : If the price of a commodity increases by r % , then the reduction in consumption so as not to increase the expenditure is
Rule : If the price of a commodity decreases by r %, then increase in consumption, so as not to decrease expenditure on this item, is
Rule : If first value is r % more than the second value, then the second is
Less than the first value
Rule : If the first value id r % less than the second value then, the second value is
More than the first value
Rule : If the value of a number is first increased by x % and later decreased by x %, the net change is always a decrease which is equal to x % of x OR
Rule : If the value of a quantity first increased by x % and then decreased by y % then there is
Increase or decrease according to +ve or -ve sign
Rule : If the value is first increased by x % and then by y % then the final increase is given by
Ex. If A' s Salary is 15 % more than B' s salary, then how much percentage B 's income is less than A 's income
Ex. If The tax on a commodity is diminished by 15 % and its consumption increases by 20 %. Find the effect on revenue.
Ex. The number of seats in a PVR Hall is increased by 15 %, price on a ticket is also increased by 5 %. What is the effect on the revenue collected ?
Sol: Effect on Revenue ( % increase ) :
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