Population Calculation

Suppose the original population of a city is P. If the annual rate of increase/decrease is constant say r%. then the population in n years will be:  

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One quantity is how much % of other

If two values are p% and q% more than a third value, then the first is

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Successive increase in quantity by certain percentage.

Suppose X units of an item is available. p% is added to it first. Then q% of the increased quantity is added. Again r% of the increased quantity is added.

If the current amount becomes Y unit then, initial amount X is calculated using the following relation:

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If A is p% of C and B is q% of C, then A is...

If A is p% of C and B is q% of C, then A is

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X is increased by p% and later decreased by q% then net change...

If any value X is first increased by p% and later decreased by q% then the net increase or decrease is given by:

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X is increased by p% and later decreased by p% then net change...

If a value say X is increased by p% and later decreased by p% then the net change is always a decrease in percentage, which is given by:

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If A is p% less than B, then B is.....

If A is p% less than B, then B is

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If A is p% more than B, then B is.....

If A is p% more than B, then B is (100 × p / (100 + p))% less than A.

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