19.43% is the change from 813 to 971
Calculation steps:
[( 971 - 813 ) ÷ 813] x 100 = 19.43%
Formula
Percentage change = [(971 - 813) / 813] x 100
Subtract the new number by the original number
971 - 813 = 158
158 ÷ 813 = 0.1943419434194342
0.1943419434194342 x 100 = 19.43%