18.53% is the change from 815 to 966
Calculation steps:
[( 966 - 815 ) ÷ 815] x 100 = 18.53%
Formula
Percentage change = [(966 - 815) / 815] x 100
Subtract the new number by the original number
966 - 815 = 151
151 ÷ 815 = 0.18527607361963191
0.18527607361963191 x 100 = 18.53%