3.21% is the change from 966 to 997
Calculation steps:
[( 997 - 966 ) ÷ 966] x 100 = 3.21%
Formula
Percentage change = [(997 - 966) / 966] x 100
Subtract the new number by the original number
997 - 966 = 31
31 ÷ 966 = 0.032091097308488616
0.032091097308488616 x 100 = 3.21%