20.12% is the change from 691 to 830
Calculation steps:
[( 830 - 691 ) ÷ 691] x 100 = 20.12%
Formula
Percentage change = [(830 - 691) / 691] x 100
Subtract the new number by the original number
830 - 691 = 139
139 ÷ 691 = 0.2011577424023155
0.2011577424023155 x 100 = 20.12%