3.23% is the change from 960 to 991
Calculation steps:
[( 991 - 960 ) ÷ 960] x 100 = 3.23%
Formula
Percentage change = [(991 - 960) / 960] x 100
Subtract the new number by the original number
991 - 960 = 31
31 ÷ 960 = 0.03229166666666667
0.03229166666666667 x 100 = 3.23%