20.86% is the change from 671 to 811
Calculation steps:
[( 811 - 671 ) ÷ 671] x 100 = 20.86%
Formula
Percentage change = [(811 - 671) / 671] x 100
Subtract the new number by the original number
811 - 671 = 140
140 ÷ 671 = 0.20864381520119224
0.20864381520119224 x 100 = 20.86%