percent calculation rate 8:
problem: The population of a a small city was 40 000 at the end of 2010.
The population had increased to 41 000 at the end of 2012.
question: What percent of increase is this ?
answer:
given: part (population 2012) = 41 000 base value (population in 2010) = 40 000
wanted: rate (increase)
formula:
rate = part : base value * 100
rate = 41 000 : 40 000 * 100
rate = 102,5 %
102,5 % – 100 % = 2,5% increase
answer:
The percent of increase is 2,5%.