Question

how to compare different countries or states​

Answer 1

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We can compare country or states on various subjects but the important subjects on which tey are compared are:

Per Capital Income.

Literacy Rate.

Infant Mortality Rate.

Net Attandance Ratio.

Population.

Cleanliness ( as in Swacch Sarvekhan Programme)

Poverty Line.

Pollution Level.

Answer 2

For measuring countries there income is considered one of the most important attributes.

Method of measuring income :

Total income :- of the country is the income of all the residents of the country.

Average income is the total income of the country divided by it's total population.

The average income is also called as Per capita income.

PCI = Total income of the country/Total population.