Question

The population of a town increased from 620 to 700. What is the percent of increase?

Answer 1

To find the percent increase, we divide the amount of change by the original number. The amount of change is the difference between the 2 numbers which in this case is 700 - 620 and the original number is 620.

$So$ $we$ $have$ $\frac{700 - 620}{620}$

700 - 620 is 80 so we're left with $\frac{80}{620}$ which is 0.129.

Finally, since our problem is asking for a percent, we write 0.129 as a percent by moving the decimal point 2 places to the right to get 12.9%

So when the population of a town changes from 620 to 700, it has increased by 12.9%.