18.41% is the change from 820 to 971
Calculation steps:
[( 971 - 820 ) ÷ 820] x 100 = 18.41%
Formula
Percentage change = [(971 - 820) / 820] x 100
Subtract the new number by the original number
971 - 820 = 151
151 ÷ 820 = 0.18414634146341463
0.18414634146341463 x 100 = 18.41%