One year, the population of a city was 253,000. Several years later it was 288,420. Find the percent increase.
To find the percent increase, we need to find the difference between the new population and the original population, and then express it as a percentage of the original population.
The difference in population is 288,420 - 253,000 = 35,420.
To express this as a percentage of the original population, we divide the difference by the original population and multiply by 100:
(35,420 / 253,000) * 100 = 13.99% (rounded to two decimal places).
Therefore, the percent increase is approximately 13.99%.