If the new is greater than the original, then it is an increase
Since the new is 90
Since the original is 80
90 > 80
New > original
Then it is the increase
To find the percent of increase subtract them and divide it by the original, then multiply the answer by 100%
[tex]\text{Increase =}\frac{90-80}{80}\times100[/tex]The increasing percent is 12.5%
