After batman brought the joker to justice , the crime rate in arkham city decreased by 12%. previously the crime rate was c incidents per 1000 people

Previous crime rate = c incidents per 1,000 people

Reduction in crime rate after batman brought the joker to justice = 12%

Hence, new crime rate (per 1,000 people) would be = c - 12%×c

⇒ New crime rate (per 1,000 people) would be = c - 0.12×c

⇒ New crime rate (per 1,000 people) would be = 0.88×c

Hence, now the crime rate is 0.88×c per 1,000 people.

The new crime rate is 0.88c.

And can be determined by w crime rate is defined as the subtract the previously the crime rate was c incidents per 1000 people from a decrease in percent of crime.

Given

After batman brought the joker to justice, the crime rate in Arkham city decreased by 12%.

Previously the crime rate was c incidents per 1000 people.

New crime rate is defined as the subtract the previously the crime rate was c incidents per 1000 people from a decrease in percent of crime.

Previous crime rate = c incidents per 1,000 people;

Therefore,

The new crime rate is;

New crime rate = previously crime rate - decrease in crime percentage.

New crime rate = c - 12%c

New crime rate = c - 0.12c

New crime rate = 0.88c

Hence, the new crime rate is 0.88c.

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