31.66% is the change from 619 to 815
Calculation steps:
[( 815 - 619 ) ÷ 619] x 100 = 31.66%
Formula
Percentage change = [(815 - 619) / 619] x 100
Subtract the new number by the original number
815 - 619 = 196
196 ÷ 619 = 0.3166397415185784
0.3166397415185784 x 100 = 31.66%