The population of a town increased from 5,600 to 6,300 people. what was the percent increase?

12.5%
First you need to find how much more the population increased (700 people)
Then you set up for a cross multiply and divide
700/5600 x/100 
the 700 OVER 5600 people in fraction format shows the number of people arrived against the number of people already present
the x OVER 100 are the percentages, x representing what we need to find
The next step would then multiply 700x100 (cross multiply)
Then with the number you found 70,000 you would then divide by 5600 (divide)