2.31% is the change from 909 to 930
Calculation steps:
[( 930 - 909 ) ÷ 909] x 100 = 2.31%
Formula
Percentage change = [(930 - 909) / 909] x 100
Subtract the new number by the original number
930 - 909 = 21
21 ÷ 909 = 0.0231023102310231
0.0231023102310231 x 100 = 2.31%