18.27% is the change from 821 to 971
Calculation steps:
[( 971 - 821 ) ÷ 821] x 100 = 18.27%
Formula
Percentage change = [(971 - 821) / 821] x 100
Subtract the new number by the original number
971 - 821 = 150
150 ÷ 821 = 0.18270401948842874
0.18270401948842874 x 100 = 18.27%