16.85% is the change from 831 to 971
Calculation steps:
[( 971 - 831 ) ÷ 831] x 100 = 16.85%
Formula
Percentage change = [(971 - 831) / 831] x 100
Subtract the new number by the original number
971 - 831 = 140
140 ÷ 831 = 0.1684717208182912
0.1684717208182912 x 100 = 16.85%