9.64% is the change from 830 to 910
Calculation steps:
[( 910 - 830 ) ÷ 830] x 100 = 9.64%
Formula
Percentage change = [(910 - 830) / 830] x 100
Subtract the new number by the original number
910 - 830 = 80
80 ÷ 830 = 0.0963855421686747
0.0963855421686747 x 100 = 9.64%