31.14% is the change from 623 to 817
Calculation steps:
[( 817 - 623 ) ÷ 623] x 100 = 31.14%
Formula
Percentage change = [(817 - 623) / 623] x 100
Subtract the new number by the original number
817 - 623 = 194
194 ÷ 623 = 0.3113964686998395
0.3113964686998395 x 100 = 31.14%