Question

The number of traffic violations in a city increased from 12 to 16 in a month.

What is the percent of increase in the number of traffic violations for that month? Round to the nearest percent, if necessary

Answer 1

inc amount /total new amount=(16-12)/16=4/16=1/4
for %=1/4 *100=25%

Answer 2

% change = (100%)(new-old)/old = (100%)(16-12)/12 = 4/12 = 33%

Answer 3

The population in a small city increased from 1250 people to 2780 people.

What is the percent of increase in the number of people?
Round to the nearest percent.